Wars of Alexander the Great
The wars of Alexander the Great were a series of conquests and military campaigns carried out by Alexander III of Macedon from 336 to 323 BC. They began with his conquest of the Achaemenid Empire, which was ruled by Darius III. After a series of victories over the Persians and the defeat of Darius, he began a campaign against local chieftains and warlords that stretched from Greece to as far as the Indus Valley. At the time of his death, Alexander ruled over most regions of Greece and the conquered Achaemenid Empire, including much of Achaemenid Egypt.
Despite his military accomplishments, Alexander did not establish a stable empire, and his untimely death threw the vast territories he conquered into a series of civil wars known as the Wars of the Diadochi.
Alexander ascended to the throne of Macedon following the assassination of his father, Philip II. During his two decade reign, Philip II had unified the poleis or Greek city-states of mainland Greece under the Macedonian led League of Corinth. Alexander proceeded to solidify Macedonian rule by quashing a rebellion by the Greek city-states in the south and staged a short but bloody excursion against the city-states to the north. He then proceeded east to carry out his plans to conquer the Achaemenid Empire. His campaign of conquests which began in Greece spanned across Anatolia, Syria, Phoenicia, Egypt, Mesopotamia, Greater Iran, Afghanistan, and India. The borders of his Macedonian Empire extended as far east as the city of Taxila in modern-day Pakistan.
Prior to his death, Alexander had also made plans for a Macedonian military and mercantile expedition into the Arabian Peninsula, after which he planned to turn west to Carthage. However, with Alexander's death, his generals, the Diadochi abandoned these plans and within a few years, began fighting against each other dividing the territories of the Macedonian Empire among themselves, these wars lasted for 40 years and took place during the Hellenistic period.
Historical campaigns
Background
In 336 BC, Philip II was assassinated by the captain of his bodyguards, Pausanias of Orestis. Philip's son, and previously designated heir, Alexander, was proclaimed king by the Macedonian noblemen and army. He also succeeded his father as head of the League of Corinth, a confederation of Greek states that were under the hegemony of Macedonia in order to combat the Achaemenid Empire.News of Philip's death roused many states into revolt, including Thebes, Athens, Thessaly, as well as the Thracian tribes to the north of Macedon. When news of the revolt reached Alexander, he took quick action. Although his advisers recommended the use of diplomacy, Alexander ignored the advice and instead proceeded to gather his Macedonian cavalry of 3,000 men. Together, the army rode south towards Thessaly. When he found the Thessalian army blocking the pass between Mount Olympus and Mount Ossa, he had his men ride over Mount Ossa. When the Thessalians awoke, they found Alexander at their rear. The Thessalians quickly surrendered, and their cavalry was added to Alexander's force. He then proceeded south, towards the Peloponnese.
Alexander stopped at Thermopylae, where he was recognized as the leader of the Sacred League before heading south to Corinth. Athens sued for peace and Alexander received the envoy and pardoned anyone involved with the uprising. At Corinth, he was given the title 'Hegemon' of the Greek forces against the Persians. Whilst at Corinth, he heard the news of a Thracian uprising in the north.
Balkan campaign
Before crossing to Asia, Alexander wanted to safeguard his northern borders and, in the spring of 335 BC, he advanced into Thrace to deal with the revolt, which was led by the Illyrians and Triballi. At Mount Haemus, the Macedonian army attacked and defeated a Thracian garrison manning the heights. The Macedonians were then attacked in the rear by the Triballi, who were crushed in turn. Alexander then advanced on to the Danube, encountering the Getae tribe on the opposite shore. The Getae army retreated after the first cavalry skirmish, leaving their town to the Macedonian army. News then reached Alexander that Cleitus, King of Illyria, and King Glaukias of the Taulantii were in open revolt against Macedonian authority. Alexander defeated each in turn, forcing Cleitus and Glaukias to flee with their armies, leaving Alexander's northern frontier secure.While he was triumphantly campaigning north, the Thebans and Athenians rebelled once more. Alexander reacted immediately, but, while the other cities once again hesitated, Thebes decided to resist with the utmost vigor. This resistance was useless, however, as the city was razed to the ground amid great bloodshed and its territory divided between the other Boeotian cities. The end of Thebes cowed Athens into submission, leaving all of Greece at least outwardly at peace with Alexander.
Persia
Asia Minor
In 334 BC, Alexander crossed the Hellespont into Asia. It took over one hundred triremes to transport the entire Macedonian army, but the Persians decided to ignore the movement.In these early months, Darius still refused to take Alexander seriously or mount a serious challenge to Alexander's movements. Memnon of Rhodes, the Greek mercenary who aligned himself with the Persians, advocated for a scorched earth strategy. He wanted the Persians to destroy the land in front of Alexander, which he hoped would force Alexander's army to starve, and then to turn back. The satraps in Anatolia rejected this advice, considering it their duty to defend their land. Eventually, with Alexander advancing deeper into Persian territory, Darius ordered all five satraps of the Anatolian provinces to pool their military resources together and confront Alexander. This army was guided by Memnon, while absolute command was split among the five satraps.
Battle of the Granicus River
The Battle of the Granicus River in May 334 BC was fought in Northwestern Asia Minor, near the site of Troy. After crossing the Hellespont, Alexander advanced up the road to the capital of the Satrapy of Phrygia. The various satraps of the Persian Empire gathered their forces at the town of Zelea and offered battle on the banks of the Granicus River. Alexander ultimately fought many of his battles on a river bank. By doing so, he was able to minimize the advantage the Persians had in numbers. In addition, the deadly Persian chariots were useless on a cramped, muddy river bank.Arrian, Diodorus, and Plutarch all mention the battle, with Arrian providing the most detail. The Persians placed their cavalry in front of their infantry, and drew up on the right bank of the river. The Macedonian line was arrayed with the heavy Phalanxes in the middle, Macedonian cavalry led by Alexander on the right, and allied Thessalian cavalry led by Parmenion on the left. The Persians expected the main assault to come from Alexander's position and moved units from their center to that flank.
File:Bust Alexander BM 1857.jpg|right|thumb|Hellenistic marble bust of Alexander dating from 2nd-1st century BC, possibly from Alexandria, Egypt, now at the British Museum
Alexander's second-in-command, Parmenion, suggested crossing the river upstream and attacking at dawn the next day, but Alexander attacked immediately. He ordered a small group of cavalry and light infantry to attack from the Macedonian right to draw the Persians off the bank and into the river. Seeing that he had broken the Persian line, Alexander led his horse companions in oblique order further to the right in order to outflank the Persians and buy time for his infantry to cross the river. Several high-ranking Persian nobles were killed by Alexander himself or his bodyguards, although Alexander was stunned by an axe-blow from a Persian nobleman named Spithridates. Before the noble could deal a death-blow, however, he was killed by Cleitus the Black. The Macedonian cavalry opened a hole in the Persian line as the Macedonian infantry advanced, forcing the enemy back and eventually breaking their center. The Persian cavalry turned and fled the battlefield, and the Greek mercenary infantry they held in reserve were encircled by the Macedonians and slaughtered; only around two-thousand of which survived, and were sent back to Macedonia for labor.
Alexander consolidates support in Asia Minor
After the battle, Alexander buried the dead Greeks and Persians and sent the captured Greek mercenaries back to Greece to work in the mines as an abject lesson for any Greek who decided to fight for the Persians. He sent some of the spoils back to Greece, including three hundred panoplies back to Athens to be dedicated in the Parthenon with the inscription "Alexander, son of Philip and the Greeks, Lacedaemonians excepted, these spoils from the barbarians who dwell in Asia".Antipater, whom Alexander had left in charge of Macedon in his absence, had been given a free hand to install dictators and tyrants wherever he saw fit in order to minimize the risk of a rebellion. As he moved deeper into Persia, however, the threat of trouble seemed to grow. Many of these towns had been ruled for generations by heavy handed tyrants, so in these Persian towns, he did the opposite of what he did in Greece. Wanting to appear to be a liberator, he freed the population and allowed self-government. As he continued marching into Persia, he saw that his victory at Granicus had been lost on no one. Town after town seemed to surrender to him. The satrap at Sardis, as well as his garrison, was among the first of many satraps to capitulate.
As these satraps gave up, Alexander appointed new ones to replace them, and claimed to distrust the accumulation of absolute power into anyone's hands. There appeared to be little change from the old system. Alexander, however, appointed independent boards to collect tribute and taxes from the satrapies, which appeared to do nothing more than improve the efficiency of government. The true effect, however, was to separate the civil from the financial function of these satrapies, thus ensuring that these governments, while technically independent of him, never truly were. Otherwise, he allowed the inhabitants of these towns to continue as they always had, and made no attempt to impose Greek customs on them. Meanwhile, ambassadors from other Greek cities in Asia Minor came to Alexander, offering submission if he allowed their 'democracies' to continue. Alexander granted their wish, and allowed them to stop paying taxes to Persia, but only if they joined the League of Corinth. By doing so, they promised to provide monetary support to Alexander.