In this way Seleucus became king of Babylonia. He also acquired the kingdom of Media, slaying with his own hand in battle Nicator whom Antigonus had left as satrap of that country. He afterward waged many wars with Macedonians and barbarians. The two principal ones were with Macedonians, the second with Lysimachus, king of Thrace, the first with Antigonus at Ipsus in Phrygia, where Antigonus commanded in person and fought in person although he was above eighty years of age. Antigonus
was killed in battle, and then all the kings who had been
in league with Seleucus against him divided his territory among themselves. At this division all Syria from the Euphrates to the sea, also inland Phrygia, fell to the lot of Seleucus. Always lying in wait for the neighboring nations, strong in arms and persuasive in council, he acquired Mesopotamia, Armenia, the so-called Seleucid Cappadocia, the Persians, Parthians, Bactrians, Arabs, Tapyri, Sogdiani, Arachotes, Hyrcanians, and other adjacent peoples that had been subdued by Alexander, as far as the river Indus, so that the boundaries of his empire were the most extensive in Asia after that of Alexander. The whole region from Phrygia to the Indus was subject to Seleucus. He crossed the Indus and waged war with Androcottus, king of the Indians, who dwelt on the banks of that stream, until they came to an understanding with each other and contracted a marriage relationship. Some of these exploits were performed before the death of Antigonus and some afterward.