At Tyre, Alexander the Great received aid from Europe, restructured his forces and begun for Babylon. He conquered the lands between the Tigris and Euphrates rivers and discovered the Persian army situated in the Gaugamela plains. Although urged to attack during night, Alexander refused because he wanted to an equal fight. Alexander had an army of 40,000 infantry and 7,000 but was heavily outnumbered by Darius' forces which had an estimated 90,000-250,000 men. Alexander used his military brilliance to create two flanks and go through the middle. King Darius III fled once again and the battle was an enormous victory for Alexander The Great and his army. Darius fled to Ecbatana in Media, and Alexander occupied Babylon, the imperial capital Susa, and the Persian capital Persepolis, and was henceforth proclaimed king of Asia. Four months later, the Macedonians burned the royal palace in Persepolis, completing the end of the ancient Persian Empire.