Bessus to aid him.

Bessus later took part in the Battle of Gaugamela against Alexander in 331 BC, where he supplied Darius III with a contingent composed of Bactrians, Sogdians, Indians, as well as his Saka allies. He led the cavalry on the left wing of the Persian forces, with the intention of crippling Alexander's attack on that flank. Following the Persian defeat at the battle, Bessus followed Darius III in his flight to the city of Ecbatana