 In 315 BCE, Peithon, son of Agenor, was named satrap of Babylonia by Antigonus Monophthalmus, and participated on his side in his fight against Cassander and Ptolemy in 314 BCE.Peithon was together with Nearchus, a former admiral of Alexander, assisting Demetrius, the son of Antigonus.At the Battle of Gaza in autumn 312 BCE, the Egyptian side under Ptolemy won, and Peithon was killed in action.