King Darius (550-486 BC) tried to conquer the then known worl twice, tasting defeat both times. First he and the Persians tried to conquer Greece at the Battle of Marathon, but was defeated very quickly, within a few hours. Then, later on, he went to face Alexander the Great and the Macedonians at the Battle of Gaugamela, which he left his family behind to flee. He was later killed by his generals, whom Alexander had executed. Darius' body was recovered by Alexander, and buried in Alexander's cloak and as a respected general.