From a young age Alexander showed great potential, At the age of thirteen, his father wanted to give his son the best Greek education. His father got Greek philosopher Aristotle to teach Alexander. He learned from Aristotle all about Greek culture, science and philosophy. While learning with Aristotle, he read the epic poem the Iliad, which told the story of the Trojan War. Legend has it that he carried Aristotle's copy of the Iliad while he was conquering the lands in Asia. When he was sixteen he studies were cut short, his father brought him to the battlefield to improve his military capabilities. Right away he exhibited a talent for horses. His talent with horses is described in the legend of how Alexander came to acquire his favorite horse, Bucephala. Bucephala was a wild horse that refused to be tamed by anyone, but Alexander was not afraid of the horse and the only person able to tame the horse. After calming the horse down, Alexander simply mounted the horse and rode him. When he was eighteen he led his first cavalry for his father Philip's attack at the battle of Chaeronea. The battle marked a victory for Macedonia against The Greek city-states, giving Philip control over most of Greece. King Philip was assassinated when Alexander was nineteen. Some speculate that Alexander and his mother had something to do with the assassination.
Alexander took the throne with the support of the Macedonian army. There were many rebellions in the beginning of his reign, Alexander stopped the rebellions and set an example to the rest of Greece decimating Greece. Once Alexander had a hold of Greece he went after the Persian empire, following his father's wishes to conquer them when he was alive. Although the Persian empire as a world power was weakening under the rule of King Darius III, Persia still controlled lands from Asia minor to India. Before he left on a campaign to Asia Minor, known as modern day Turkey today, Alexander went to see an oracle of Apollo in Delphi to have his future foretold. The oracle told him was invincible, this no doubt, gave him the courage to go on with his campaign against Persia. Alexander led his army in 334 B.C to Asia Minor, he had 35,000 men in his army. The army was made up of approximately 5,000 cavalrymen and 30,000 infantrymen, this included some of the Macedonian army and Greek mercenaries eager to fight against the Persians. He also took along doctors, historians and siege engineers, their expertise would be key to the campaign's success. Alexander's army met with the Persian armies for the first time in the city of Granicus. The Persians hoped to lure Alexander