He was born in July 356 BCE to Macedonian king Philip II and Philip’s fourth wife, Olympias. Educated during his teenage years by a series of prestigious tutors, (including Aristotle beginning in 343 BCE) he would rule as regent of Macedonia while Philip invaded Greece around 340 BCE. Alexander proved his mettle in combat during the battle at Chaeronea against Thebes and Athens, crushing the Sacred Band, the feared elite Theban infantry. Chaeronea was a crucial battle against a rebellious Greece. Philip II became ruler of all the Greek city-states in 338 BCE. Philip II would be assassinated by a bodyguard named Pausanias in 336 BCE, allowing Alexander to succeed him by assassinating any rivals at court. In 334 BCE, Alexander crossed the Hellespont – a body of water separating Europe from Asia Minor – at the head of an allied army. In the same year, he visited the site of Troy and conquered western Asia Minor, defeating a Persian army at Granicus. In November 333 BCE, he defeated the Persian King Darius at Issus in modern Syria, but Darius escaped. In 332 BCE, he conquered Tyre (Lebannon) and Gaza (Israel) after sieges. Also in 332 BCE, he conquered Egypt and was hailed as pharaoh and founded Alexandria. In October of 331 BCE, he met Darius again in battle at Gaugamela and defeated the Persians permanently, but Darius again escaped. Darius would be murdered by his own entourage in 330 BCE, allowing Alexander to assume leadership of the Persian Empire. Also in 330 BCE, Alexander suppressed a conspiracy in his own ranks, putting his own second-in-command, Parmenion, to death in the process. During a drunken rage in 328 BCE, Alexander murdered a close friend and high-ranking officer named Clitus the Black. In 327 BCE, he married Roxanne, a Sogdian princess, and also bloodily suppressed another conspiracy among his pages, who objected to his taking Persian customs. After invading the Punjab in 326 BCE, he defeated King Porus at the battle of Hydaspes. His beloved horse Bucephalus was killed the same year. That same year, he reached the Hyphasis River but was forced to turn back by mutinous soldiers. He started following the Jhelum tributary of the Indus River back to the sea. In 324 BCE, he led some of his men back to Persia in a march across the Gedrosian Desert that cost many of his men their lives. That same year, there was another mutiny occurs due to Alexander’s recruiting Persians. Many Macedonians were discharged at this time. Alexander’s homosexual lover, Hephaestion, died that same year, plunging Alexander into deep grief. Finally, Alexander died of a fever in Babylon on June 11th, 323 BCE, leaving his empire “to the strongest”.