Perdiccas (Greek: Περδίκκας, Perdikkas; c. 355 BC – 321/320 BC) was a general of Alexander the Great. He took part in the Macedonian campaign against the Achaemenid Empire, and, following Alexander's death in 323 BC, rose to become supreme commander of the imperial army, as well as regent for Alexander's half brother and intellectually disabled successor, Philip Arridaeus (Philip III).