Alexander the Great

Alexander III was born in Pella, the capital of the Kingdom of Macedon, on the sixth day of the ancient Greek month of Hekatombaion, which probably corresponds to 20 July 356 BC (although the exact date is uncertain). He was the son of the king of Macedon, Philip II of the Argead dynasty, and his fourth wife, Olympias, daughter of King Neoptolemus I of Epirus. Although Philip had seven or eight wives, Olympias was his principal wife for some time, likely because she gave birth to Alexander.

Several legends surround Alexander's birth and childhood. According to the ancient Greek biographer Plutarch, on the eve of the consummation of her marriage to Philip, Olympias dreamed that her womb was struck by a thunderbolt that caused a flame to spread "far and wide" before dying away. Sometime after the wedding, Philip is said to have seen himself, in a dream, securing his wife's womb with a seal engraved with a lion's image. Plutarch offered a variety of interpretations for these dreams: that Olympias was pregnant before her marriage, indicated by the sealing of her womb; or that Alexander's father was Zeus. Ancient commentators were divided about whether the ambitious Olympias promulgated the story of Alexander's divine parentage, variously claiming that she had told Alexander, or that she dismissed the suggestion as impious. Despite this, Alexander could claim, by way of his father Phillip II, descendance from Temenus, a descendant of Heracles (thereby also making him a very distant relation to the hero Perseus), and descendance by way of his mother's family, the Aeacidae, to Neoptolemus, son of the warrior Achilles.

On the day Alexander was born, Philip was preparing a siege on the city of Potidea on the peninsula of Chalcidice. That same day, Philip received news that his general Parmenion had defeated the combined Illyrian and Paeonian armies and that his horses had won at the Olympic Games. It was also said that on this day, the Temple of Artemis in Ephesus, one of the Seven Wonders of the World, burnt down, with Hegesias of Magnesia claiming that it had burnt down because Artemis was away, attending the birth of Alexander. Such legends may have emerged when Alexander was king, and possibly at his instigation, to show that he was superhuman and destined for greatness from conception.

In his early years, Alexander was raised by a nurse, Lanike, sister of Alexander's future general Cleitus the Black. Later in his childhood, Alexander was tutored by the strict Leonidas, a relative of his mother, and by Lysimachus of Acarnania. Alexander was raised in the manner of noble Macedonian youths, learning to read, play the lyre, ride, fight, and hunt. When Alexander was ten years old, a trader from Thessaly brought Philip a horse, which he offered to sell for thirteen talents. The horse refused to be mounted, and Philip ordered it away. Alexander, however, detecting the horse's fear of its own shadow, asked to tame the horse, which he eventually managed. Plutarch stated that Philip, overjoyed at this display of courage and ambition, kissed his son tearfully, declaring: "My boy, you must find a kingdom big enough for your ambitions. Macedon is too small for you", and bought the horse for him. Alexander named it Bucephalas, meaning "ox-head". Bucephalas carried Alexander as far as modern-day India. When Bucephalas died (because of old age, according to Plutarch, at age 30), Alexander named a city after him, Bucephala.

When Alexander was 13, Philip began to search for a tutor, and considered such academics as Isocrates and Speusippus, the latter offering to resign from his stewardship of the Academy to take up the post. In the end, Philip chose Aristotle and provided the Temple of the Nymphs at Mieza as a classroom. In return for teaching Alexander, Philip agreed to rebuild Aristotle's hometown of Stageira, which Philip had razed, and to repopulate it by buying and freeing the ex-citizens who were slaves, or pardoning those who were in exile.

Mieza was like a boarding school for Alexander and the children of Macedonian nobles, such as Ptolemy, Hephaestion, and Cassander. Many of these students would become his friends and future generals, and are often known as the "Companions". Aristotle taught Alexander and his companions about medicine, philosophy, morals, religion, logic, and art. Under Aristotle's tutelage, Alexander developed a passion for the works of Homer, and in particular the Iliad; Aristotle gave him an annotated copy, which Alexander later carried on his campaigns. Alexander was able to quote Euripides from memory.

In his youth, Alexander was also acquainted with Persian exiles at the Macedonian court, who received the protection of Philip II for several years as they opposed Artaxerxes III. Among them were Artabazos II and his daughter Barsine, possible future mistress of Alexander, who resided at the Macedonian court from 352 to 342 BC, as well as Amminapes, future satrap of Alexander, and a Persian nobleman named Sisines. This gave the Macedonian court a good knowledge of Persian issues, and may even have influenced some of the innovations in the management of the Macedonian state.

Suda writes that Anaximenes of Lampsacus was one of Alexander's teachers, and that Anaximenes also accompanied Alexander on his campaigns.

At the age of 16, Alexander's education under Aristotle ended. Philip II had waged war against the Thracians to the north, which left Alexander in charge as regent and heir apparent. During Philip's absence, the Thracian tribe of Maedi revolted against Macedonia. Alexander responded quickly and drove them from their territory. The territory was colonized, and a city, named Alexandropolis, was founded.

Upon Philip's return, Alexander was dispatched with a small force to subdue the revolts in southern Thrace. Campaigning against the Greek city of Perinthus, Alexander reportedly saved his father's life. Meanwhile, the city of Amphissa began to work lands that were sacred to Apollo near Delphi, a sacrilege that gave Philip the opportunity to further intervene in Greek affairs. While Philip was occupied in Thrace, Alexander was ordered to muster an army for a campaign in southern Greece. Concerned that other Greek states might intervene, Alexander made it look as though he was preparing to attack Illyria instead. During this turmoil, the Illyrians invaded Macedonia, only to be repelled by Alexander.

Philip and his army joined his son in 338 BC, and they marched south through Thermopylae, taking it after stubborn resistance from its Theban garrison. They went on to occupy the city of Elatea, only a few days' march from both Athens and Thebes. The Athenians, led by Demosthenes, voted to seek alliance with Thebes against Macedonia. Both Athens and Philip sent embassies to win Thebes's favour, but Athens won the contest. Philip marched on Amphissa (ostensibly acting on the request of the Amphictyonic League), capturing the mercenaries sent there by Demosthenes and accepting the city's surrender. Philip then returned to Elatea, sending a final offer of peace to Athens and Thebes, who both rejected it.

As Philip marched south, his opponents blocked him near Chaeronea, Boeotia. During the ensuing Battle of Chaeronea, Philip commanded the right wing and Alexander the left, accompanied by a group of Philip's trusted generals. According to the ancient sources, the two sides fought bitterly for some time. Philip deliberately commanded his troops to retreat, counting on the untested Athenian hoplites to follow, thus breaking their line. Alexander was the first to break the Theban lines, followed by Philip's generals. Having damaged the enemy's cohesion, Philip ordered his troops to press forward and quickly routed them. With the Athenians lost, the Thebans were surrounded. Left to fight alone, they were defeated.

Following their victory at Chaeronea, Philip and Alexander marched unopposed into the Peloponnese, devastating much of Laconia and ejecting the Spartans from various parts of it. At Corinth, Philip established a "Hellenic Alliance" (modelled on the old anti-Persian alliance of the Greco-Persian Wars), which included most Greek city-states except Sparta. Philip was then named Hegemon (often translated as "Supreme Commander") of this league (known by modern scholars as the League of Corinth), and announced his plans to attack the Persian Empire.

When Philip returned to Pella, he fell in love with and married Cleopatra Eurydice in 338 BC, the niece of his general Attalus. The marriage made Alexander's position as heir less secure, since any son of Cleopatra Eurydice would be a fully Macedonian heir, while Alexander was only half-Macedonian. During the wedding banquet, a drunken Attalus publicly prayed to the gods that the union would produce a legitimate heir.

At the wedding of Cleopatra, whom Philip fell in love with and married, she being much too young for him, her uncle Attalus in his drink desired the Macedonians would implore the gods to give them a lawful successor to the kingdom by his niece. This so irritated Alexander that throwing one of the cups at his head, "You villain," said he, "what, am I then a bastard?" Then Philip, taking Attalus's part, rose up and would have run his son through; but by good fortune for them both, either his over-hasty rage, or the wine he had drunk, made his foot slip, so that he fell down on the floor, at which Alexander reproachfully insulted him: "See there," said he, "the man who makes preparations to pass out of Europe into Asia, overturned in passing from one seat to another."

In 337 BC, Alexander fled Macedon with his mother, dropping her off with her brother, King Alexander I of Epirus in Dodona, capital of the Molossians. He continued to Illyria where he sought refuge with one or more Illyrian kings, perhaps with Glaucias, and was treated as a guest, despite having defeated them in battle a few years before. However, it appears Philip never intended to disown his politically and militarily trained son. Accordingly, Alexander returned to Macedon after six months due to the efforts of a family friend, Demaratus, who mediated between the two parties.

In the following year, the Persian satrap (governor) of Caria, Pixodarus, offered his eldest daughter to Alexander's half-brother, Philip Arrhidaeus. Olympias and several of Alexander's friends suggested this showed Philip intended to make Arrhidaeus his heir. Alexander reacted by sending an actor, Thessalus of Corinth, to tell Pixodarus that he should not offer his daughter's hand to an illegitimate son, but instead to Alexander. When Philip heard of this, he stopped the negotiations and scolded Alexander for wishing to marry the daughter of a Carian, explaining that he wanted a better bride for him. Philip exiled four of Alexander's friends, Harpalus, Nearchus, Ptolemy and Erigyius, and had the Corinthians bring Thessalus to him in chains.

In the 24th day of the Macedonian month Dios, which probably corresponds to 25 October 336 BC, while at Aigai (near modern Vergina) attending the wedding of his daughter Cleopatra to Olympias's brother, Alexander I of Epirus, Philip was assassinated by the captain of his bodyguards, Pausanias, who, according to Diodorus, was also his lover. As Pausanias tried to escape, he tripped over a vine and was killed by his pursuers, including two of Alexander's companions, Perdiccas and Leonnatus. Alexander was proclaimed king on the spot by the nobles and army at the age of 20.

Alexander began his reign by eliminating potential rivals to the throne. He had his cousin, the former Amyntas IV, executed and two Macedonian princes from the region of Lyncestis killed for having been involved in his father's assassination, but spared a third, Alexander Lyncestes. Olympias had Cleopatra Eurydice, and Europa, her daughter by Philip, burned alive, though this infuriated Alexander. Alexander also ordered the murder of Cleopatra's uncle Attalus, who was in command of the advance guard of the army in Asia Minor. Attalus was at that time corresponding with Demosthenes regarding the possibility of defecting to Athens, and had severely insulted Alexander. After his niece's murder, Alexander may have considered him too dangerous to be left alive. Alexander spared Arrhidaeus, who was by all accounts mentally disabled, possibly as a result of poisoning by Olympias.

News of Philip's death roused many states into revolt, including Thebes, Athens, Thessaly, and the Thracian tribes north of Macedon. When news of the revolts reached Alexander, he responded quickly. Though advised to use diplomacy, Alexander mustered 3,000 Macedonian cavalry and rode south towards Thessaly. He found the Thessalian army occupying the pass between Mount Olympus and Mount Ossa, and ordered his men to ride over Mount Ossa. When the Thessalians awoke the next day, they found Alexander in their rear and promptly surrendered, adding their cavalry to Alexander's force. He then continued south towards the Peloponnese.

Alexander stopped at Thermopylae where he was recognized as the leader of the Amphictyonic League before heading south to Corinth. Athens sued for peace and Alexander pardoned the rebels. The famous encounter between Alexander and Diogenes the Cynic occurred during Alexander's stay in Corinth. When Alexander asked Diogenes what he could do for him, the philosopher disdainfully asked Alexander to stand a little to the side, as he was blocking the sunlight. This reply apparently delighted Alexander who is reported to have said, "But verily, if I were not Alexander, I would like to be Diogenes." At Corinth, Alexander took the title of Hegemon ("leader") and, like Philip, was appointed commander for the coming war against Persia. He also received news of a Thracian uprising.

Before crossing to Asia, Alexander wanted to safeguard his northern borders. In the spring of 335 BC, he advanced to suppress several revolts. Starting from Amphipolis, he travelled east into the country of the "Independent Thracians", and at Mount Haemus, the Macedonian army attacked and defeated the Thracian forces manning the heights. The Macedonians marched into the country of the Triballi and defeated their army near the Lyginus river (a tributary of the Danube). Alexander then marched for three days to the Danube, encountering the Getae tribe on the opposite shore. Crossing the river at night, he surprised them and forced their army to retreat after the first cavalry skirmish.

News then reached Alexander that the Illyrian chieftain Cleitus and King Glaukias of the Taulantii were in open revolt against his authority. Marching west into Illyria, Alexander defeated each in turn, forcing the two rulers to flee with their troops. With these victories, he secured his northern frontier.

While Alexander campaigned north, the Thebans and Athenians rebelled once again. Alexander immediately headed south. While the other cities again hesitated, Thebes decided to fight. The Theban resistance was ineffective and Alexander razed the city and divided its territory between the other Boeotian cities. The end of Thebes cowed Athens, leaving all of Greece temporarily at peace. Alexander then set out on his Asian campaign, leaving Antipater as regent.

Alexander's invasion of Persia as a whole has been denoted as a supreme example of a "strategic line" of conducting war, a line formed by "the chain of logic that connects operations into a single whole." In his book Strategy, Soviet military officer and theorist Alexander Svechin delineates Alexander's strategic steps. After securing his Greek base and the Balkans by subjugating his political opponents, and securing his army's rear through the conquest of all the Afro-Asian coastline, where the Persian fleet was based and from which it was supplied, Alexander moved to confront directly the Persians. He thus resolved the eternal problem of an army conducting operations deep into enemy territory, Svechin states, in an "exemplary manner."

After his victory at the Battle of Chaeronea, Philip II began the work of establishing himself as hēgemṓn (Greek: ἡγεμών) of a league which according to Diodorus was to wage a campaign against the Persians for the sundry grievances Greece suffered in 480 BC and free the Greek cities of the western coast and islands from Achaemenid rule. In 336 he sent Parmenion, Amyntas, Andromenes, Attalus, and an army of 10,000 men into Anatolia to make preparations for an invasion. The Greek cities on the western coast of Anatolia revolted until the news arrived that Philip had been murdered and had been succeeded by his young son Alexander. The Macedonians were demoralized by Philip's death and were subsequently defeated near Magnesia by the Achaemenids under the command of the mercenary Memnon of Rhodes.

Taking over the invasion project of Philip II, Alexander's army crossed the Hellespont in 334 BC with approximately 48,100 soldiers, 6,100 cavalry, and 120 ships with crews numbering 38,000 drawn from Macedon and various Greek city states, mercenaries, and feudally raised soldiers from Thrace, Paionia, and Illyria. He showed his intent to conquer the entirety of the Persian Empire by throwing a spear into Asian soil and saying he accepted Asia as a gift from the gods. This also showed Alexander's eagerness to fight, in contrast to his father's preference for diplomacy.

After an initial victory against Persian forces at the Battle of the Granicus, Alexander accepted the surrender of the Persian provincial capital and treasury of Sardis; he then proceeded along the Ionian coast, granting autonomy and democracy to the cities. Miletus, held by Achaemenid forces, required a delicate siege operation, with Persian naval forces nearby. Further south, at Halicarnassus, in Caria, Alexander successfully waged his first large-scale siege, eventually forcing his opponents, the mercenary captain Memnon of Rhodes and the Persian satrap of Caria, Orontobates, to withdraw by sea. Alexander left the government of Caria to a member of the Hecatomnid dynasty, Ada, who adopted Alexander.

From Halicarnassus, Alexander proceeded into mountainous Lycia and the Pamphylian plain, asserting control over all coastal cities to deny the Persians naval bases. From Pamphylia onwards, the coast held no major ports and Alexander moved inland. At Termessos, Alexander humbled and did not storm the Pisidian city. At the ancient Phrygian capital of Gordium, Alexander "undid" the hitherto unsolvable Gordian Knot, a feat said to await the future "king of Asia". According to the story, Alexander proclaimed that it did not matter how the knot was undone, and hacked it apart with his sword.

In spring 333 BC, Alexander crossed the Taurus into Cilicia. After a long pause due to an illness, he marched on towards Syria. Though outmanoeuvered by Darius's significantly larger army, he marched back to Cilicia, where he defeated Darius at Issus. Darius fled the battle, causing his army to collapse, and left behind his wife, his two daughters, his mother Sisygambis, and a fabulous treasure. He offered a peace treaty that included the lands he had lost, and a ransom of 10,000 talents for his family. Alexander replied that since he was now king of Asia, it was he alone who decided territorial divisions. Alexander proceeded to take possession of Syria, and most of the coast of the Levant. In the following year, 332 BC, he was forced to attack Tyre, which he captured after a long and difficult siege. The men of military age were massacred and the women and children sold into slavery.

When Alexander destroyed Tyre, most of the towns on the route to Egypt quickly capitulated. However, Alexander was met with resistance at Gaza. The stronghold was heavily fortified and built on a hill, requiring a siege. When "his engineers pointed out to him that because of the height of the mound it would be impossible... this encouraged Alexander all the more to make the attempt". After three unsuccessful assaults, the stronghold fell, but not before Alexander had received a serious shoulder wound. As in Tyre, men of military age were put to the sword, and the women and children were sold into slavery.

Alexander advanced on Egypt in later 332 BC where he was regarded as a liberator. To legitimize taking power and be recognized as the descendant of the long line of pharaohs, Alexander made sacrifices to the gods at Memphis and went to consult the famous oracle of Amun-Ra at the Siwa Oasis in the Libyan desert, at which he was pronounced the son of the deity Amun. Henceforth, Alexander often referred to Zeus-Ammon as his true father, and after his death, currency depicted him adorned with horns, using the Horns of Ammon as a symbol of his divinity. The Greeks interpreted this message – one that the gods addressed to all pharaohs – as a prophecy.

Egypt was only one of a large number of territories taken by Alexander from the Persians. After his trip to Siwa, Alexander was crowned in the temple of Ptah at Memphis. It appears that the Egyptian people did not find it disturbing that he was a foreigner – nor that he was absent for virtually his entire reign. Alexander restored the temples neglected by the Persians and dedicated new monuments to the Egyptian gods. In the temple of Luxor, near Karnak, he built a chapel for the sacred barge. During his brief months in Egypt, he reformed the taxation system on the Greek models and organized the military occupation of the country, but in early 331 BC he left for Asia in pursuit of the Persians.

During his stay in Egypt, he founded Alexandria, which would become the prosperous capital of the Ptolemaic Kingdom after his death. Control of Egypt passed to Ptolemy I (son of Lagos), the founder of the Ptolemaic Dynasty (305–30 BC) after the death of Alexander.

Leaving Egypt in 331 BC, Alexander marched eastward into Achaemenid Assyria in Upper Mesopotamia (now northern Iraq) and defeated Darius again at the Battle of Gaugamela. Darius once more fled the field, and Alexander chased him as far as Arbela. Gaugamela would be the final and decisive encounter between the two. Darius fled over the mountains to Ecbatana (modern Hamadan) while Alexander captured Babylon.

Babylonian astronomical diaries say that "the king of the world, Alexander" sent his scouts with a message to the people of Babylon before entering the city: "I shall not enter your houses".

From Babylon, Alexander went to Susa, one of the Achaemenid capitals, and captured its treasury. He sent the bulk of his army to the Persian ceremonial capital of Persepolis via the Persian Royal Road. Alexander himself took selected troops on the direct route to the city. He then stormed the pass of the Persian Gates (in the modern Zagros Mountains) which had been blocked by a Persian army under Ariobarzanes and then hurried to Persepolis before its garrison could loot the treasury.

On entering Persepolis, Alexander allowed his troops to loot the city for several days. Alexander stayed in Persepolis for five months. During his stay, a fire broke out in the eastern palace of Xerxes I and spread to the rest of the city. Possible causes include a drunken accident or deliberate revenge for the burning of the Acropolis of Athens during the Second Persian War by Xerxes; Plutarch and Diodorus allege that Alexander's companion, the hetaera Thaïs, instigated and started the fire. Even as he watched the city burn, Alexander immediately began to regret his decision. Plutarch claims that he ordered his men to put out the fires but the flames had already spread to most of the city. Curtius claims that Alexander did not regret his decision until the next morning. Plutarch recounts an anecdote in which Alexander pauses and talks to a fallen statue of Xerxes as if it were a live person:

Shall I pass by and leave you lying there because of the expeditions you led against Greece, or shall I set you up again because of your magnanimity and your virtues in other respects?

Alexander then chased Darius, first into Media, and then Parthia. The Persian king no longer controlled his own destiny, and was taken prisoner by Bessus, his Bactrian satrap and kinsman. As Alexander approached, Bessus had his men fatally stab the Great King and then declared himself Darius's successor as Artaxerxes V, before retreating into Central Asia to launch a guerrilla campaign against Alexander. Alexander buried Darius's remains next to his Achaemenid predecessors in a regal funeral. He claimed that, while dying, Darius had named him as his successor to the Achaemenid throne. The Achaemenid Empire is normally considered to have fallen with Darius. However, as basic forms of community life and the general structure of government were maintained and resuscitated by Alexander under his own rule, he, in the words of the Iranologist Pierre Briant "may therefore be considered to have acted in many ways as the last of the Achaemenids."

Alexander viewed Bessus as an usurper and set out to defeat him. This campaign, initially against Bessus, turned into a grand tour of central Asia. Alexander founded a series of new cities, all called Alexandria, including Alexandria Arachosia at modern Kandahar in Afghanistan, and Alexandria Eschate ("The Furthest") in modern Tajikistan. The campaign took Alexander through a number of satrapies in present-day Afghanistan and Central Asia, including Media, Parthia, Aria, Drangiana, Arachosia, Bactria, and Scythia.

In 329 BC, Spitamenes, who held an undefined position in the satrapy of Sogdiana, betrayed Bessus to Ptolemy, one of Alexander's trusted companions, and Bessus was executed. However, at some point later when Alexander was on the Jaxartes dealing with an incursion by a horse nomad army, Spitamenes raised Sogdiana in revolt. Alexander personally defeated the Scythians at the Battle of Jaxartes and immediately launched a campaign against Spitamenes, defeating him in the Battle of Gabai. After the defeat, Spitamenes was killed by his own men, who then sued for peace.

During this time, Alexander adopted some elements of Persian dress and customs at his court, notably the custom of proskynesis, either a symbolic kissing of the hand, or prostration on the ground, that Persians showed to their social superiors. This was one aspect of Alexander's broad strategy aimed at securing the aid and support of the Iranian upper classes. The Greeks however regarded the gesture of proskynesis as the province of deities and believed that Alexander meant to deify himself by requiring it. This cost him the sympathies of many of his countrymen, and he eventually abandoned it.

During the long rule of the Achaemenids, the elite positions in many segments of the empire including the central government, the army, and the many satrapies were specifically reserved for Iranians and to a major degree, Persian noblemen. The latter were in many cases additionally connected through marriage alliances with the royal Achaemenid family. This created a problem for Alexander as to whether he had to make use of the various segments and people that had given the empire its solidity and unity for a lengthy period of time.

After the death of Spitamenes and his marriage to Roxana (Raoxshna in Old Iranian) to cement relations with his new satrapies, Alexander turned to the Indian subcontinent. He invited the chieftains of the former satrapy of Gandāra (in the present-day Peshawar Valley of Pakistan), to come to him and submit to his authority. Omphis (also known as Taxiles), the ruler of Taxila, whose kingdom extended from the Indus to the Hydaspes (Jhelum), complied, but the chieftains of some hill clans, including the Aspasioi and Assakenoi, refused to submit.

In the winter of 327/326 BC, Alexander personally led Cophen campaign against the Aspasioi of the Kunar Valley, the Guraeans of the Panjkora Valley, and the Assakenoi of the Swat Valley. A fierce contest ensued with the Aspasioi in which Alexander was wounded in the shoulder by a dart, but eventually the Aspasioi lost. Alexander then faced the Assakenoi who fought against him from the strongholds of Massaga, Ora, and Aornos.

The fort of Massaga was reduced after days of bloody fighting in which Alexander was seriously wounded in the ankle. According to Curtius, "Not only did Alexander slaughter the entire population of Massaga, but also did he reduce its buildings to rubble." A similar massacre followed at Ora. In the aftermath of Massaga and Ora, numerous Assakenians fled to the fortress of Aornos. Alexander followed close behind and captured the strategic hill-fort after four bloody days. After the death of Assakenoi leader, his mother, queen Cleophis, submitted to Alexander.

After Aornos, Alexander crossed the Indus. Omphis hastened to relieve Alexander of his apprehension and met him with valuable presents, placing himself and all his forces at his disposal. Alexander not only returned Omphis his title and the gifts but he also presented him with a wardrobe of "Persian robes, gold and silver ornaments, 30 horses and 1,000 talents in gold". Alexander was emboldened to divide his forces, and Omphis assisted Hephaestion and Perdiccas in constructing a bridge over the Indus where it bends at Udabhanda, supplied their troops with provisions, and he received Alexander and his whole army in his capital city of Taxila, with every demonstration of friendship and the most liberal hospitality.

On the subsequent advance of the Macedonian king, Omphis accompanied him with a force of 5,000 men and took part in the Battle of the Hydaspes against the King Porus, who ruled territory lying between the Hydaspes and the Acesines (Chenab) in the Punjab, in 326 BC. Alexander won an epic battle against Porus. Omphis was sent by Alexander in pursuit of Porus, to whom he was charged to offer favourable terms, but narrowly escaped losing his life at the hands of his old enemy. Subsequently, the two rivals were reconciled by the personal mediation of Alexander; Omphis contributed zealously to the equipment of the fleet on the Hydaspes and was entrusted by Alexander with the government of the whole territory between that river and the Indus. Alexander was also impressed by Porus's bravery and made him an ally. He appointed Porus as satrap, and added to Porus's territory land that he did not previously own, towards the south-east, up to the Hyphasis (Beas). Choosing local rulers helped him control these lands that were distant from Greece. A considerable accession of power was granted to Porus after the death of Philip, son of Machatas, and he was allowed to retain his authority at the death of Alexander himself (323 BC), as well as in the subsequent partition of the provinces at Triparadisus, 321 BC.

Alexander founded two cities on opposite sides of the Hydaspes river, naming one Bucephala, in honour of his horse, who died around this time. The other was Nicaea (Victory), believed to be located at the site of modern-day Mong. Philostratus the Elder in the Life of Apollonius of Tyana writes that in the army of Porus, there was an elephant who fought bravely against Alexander's army, and Alexander dedicated it to the Helios (Sun) and named it Ajax because he thought that such a great animal deserved a great name. The elephant had gold rings around its tusks and an inscription was on them written in Greek: "Alexander the son of Zeus dedicates Ajax to the Helios" (ΑΛΕΞΑΝΔΡΟΣ Ο ΔΙΟΣ ΤΟΝ ΑΙΑΝΤΑ ΤΩΙ ΗΛΙΩΙ).

East of Porus's kingdom, near the Ganges River, was the Nanda Empire of Magadha, and further east, the Gangaridai Empire of the Bengal region. Fearing the prospect of facing other large armies and exhausted by years of campaigning, Alexander's army mutinied at the Hyphasis River (Beas), refusing to march farther east. This river thus marks the easternmost extent of Alexander's conquests.

As for the Macedonians, however, their struggle with Porus blunted their courage and stayed their further advance into India. For having had all they could do to repulse an enemy who mustered only twenty thousand infantry and two thousand horse, they violently opposed Alexander when he insisted on crossing the river Ganges also, the width of which, as they learned, was thirty-two furlongs [6.4 km], its depth one hundred fathoms [180 m], while its banks on the further side were covered with multitudes of men-at-arms and horsemen and elephants. For they were told that the kings of the Ganderites and Praesii were awaiting them with eighty thousand horsemen, two hundred thousand footmen, eight thousand chariots, and six thousand war elephants.

Alexander tried to persuade his soldiers to march farther, but his general Coenus pleaded with him to change his opinion and return; the men, he said, "longed to again see their parents, their wives and children, their homeland". Alexander eventually agreed and turned south, marching along the Indus. Along the way his army conquered the territory inhabited by the Mallians in the Mallian campaign; while besieging the Mallian citadel, Alexander suffered a near-fatal injury when an arrow penetrated his armor and entered his lung.

Alexander sent much of his army to Carmania (modern southern Iran) with general Craterus, and commissioned a fleet to explore the Persian Gulf shore under his admiral Nearchus, while he led the rest back to Persia through the more difficult southern route along the Gedrosian Desert and Makran. Alexander reached Susa in 324 BC, but not before losing many men to the harsh desert.

Discovering that many of his satraps and military governors had misbehaved in his absence, Alexander executed several of them as examples on his way to Susa. As a gesture of thanks, he paid off the debts of his soldiers, and announced he would send over-aged and disabled veterans back to Macedon, led by Craterus. His troops misunderstood his intention and mutinied at the town of Opis. They refused to be sent away and criticized his adoption of Persian customs and dress and the introduction of Persian officers and soldiers into Macedonian units.

After three days, unable to persuade his men to back down, Alexander gave Persians command posts in the army and conferred Macedonian military titles upon Persian units. The Macedonians quickly begged forgiveness, which Alexander accepted, and held a great banquet with several thousand of his men. In an attempt to craft a lasting harmony between his Macedonian and Persian subjects, Alexander held a mass marriage of his senior officers to Persian and other noblewomen at Susa, but few of those marriages seem to have lasted much beyond a year.Meanwhile, upon his return to Persia, Alexander learned that guards of the tomb of Cyrus the Great in Pasargadae had desecrated it, and swiftly executed them. Alexander admired Cyrus the Great, from an early age reading Xenophon's Cyropaedia, which described Cyrus's heroism in battle and governance as a king and legislator. During his visit to Pasargadae, Alexander ordered his architect Aristobulus to decorate the interior of the sepulchral chamber of Cyrus's tomb.

Afterwards, Alexander travelled to Ecbatana to retrieve the bulk of the Persian treasure. There, his closest friend, Hephaestion, died of illness or poisoning. Hephaestion's death devastated Alexander and he ordered the preparation of an expensive funeral pyre in Babylon along with a decree for public mourning. Back in Babylon, Alexander planned a series of new campaigns, beginning with an invasion of Arabia.