Which Macedonian leader conquered at what battle did it occur?

The Macedonian leader Alexander the great achieved a significant victory at the Battle of Gaugamela in 331 BC. This battle, fought against the Persian Empire led by King Darius III, was crucial in establishing Alexander's dominance over Persia. His tactical brilliance and the use of a well-disciplined army allowed him to secure a decisive victory, ultimately leading to the fall of the Persian Empire.