 Following his and Lysimachus' victory over Antigonus Monophthalmus at the decisive Battle of Ipsus in 301 BC, Seleucus took control over eastern Anatolia and northern Syria.In the latter area, he founded a new capital at Antioch on the Orontes, a city he named after his father.An alternative capital was established at Seleucia on the Tigris, north of Babylon.