Alexander the Great defeats Darius III of Persia in the Battle of Gaugamela in 331 BC.

The Battle of Gaugamela, also known as the Battle of Arbela, took place on October 1, 331 BCE, and was the final encounter between Alexander the Great of Macedon and King Darius III of Persia. After this conquest, Alexander was unquestionably crowned King of Asia. Gaugamela was a hamlet on the banks of the Bumodus River. The fight is supposed to have taken place at Tel Gomel, northern Iraq. Alexander ordered an advance against the Persian line with his soldiers in position, with his men marching obliquely to the right. As the Macedonians got closer to the enemy, Alexander started extending his right, hoping to lure the Persian cavalry in that way and create a gap between them and Darius' center.
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