The Battle of Ipsus was fought between some of the Diadochi in 301 BC near the town of Ipsus in Phrygia. Antigonus I Monophthalmus, the Greek Macedonian ruler of large parts of Asia, and his son Demetrius were pitted against the coalition of three other successors of Alexander: Cassander, ruler of Macedon; Lysimachus, ruler of Thrace; and Seleucus I Nicator, ruler of Babylonia and Persia.