Seleucus I Nicator - Admiral Under Ptolemy

Admiral Under Ptolemy

After arriving in Egypt, Seleucus sent his friends to Greece to inform Cassander and Lysimachus, the ruler of Thracia, about Antigonus. Antigonus was now the most powerful of the Diadochi, and the others would soon ally against him. The allies sent a proposition to Antigonus in which they demanded that Seleucus be allowed to return to Babylon. Antigonus refused and went to Syria, where he planned to attack Ptolemy in the spring of 314 BC. Seleucus was an admiral under Ptolemy. At the same time he started the siege of Tyros, Antigonus allied with Rhodes. The island had a strategic location and its navy was capable of preventing the allies from combining their forces. Because of the threat of Rhodes, Ptolemy gave Seleucus a hundred ships and sent him to the Aegean Sea. The fleet was too small to defeat Rhodes, but it was big enough to force Asander, the satrap of Caria, to ally with Ptolemy. To demonstrate his power, Seleucus also invaded the city of Erythrai. Ptolemy, nephew of Antigonus, attacked Asander. Seleucus returned to Cyprus, where Ptolemy I had sent his brother Menelaos along with 10,000 mercenaries and 100 ships. Seleucus and Menelaos began to besiege Kition. Antigonus sent most of his fleet to the Aegean Sea and his army to Asia Minor. Ptolemy now had an opportunity to invade Syria, where he defeated Demetrius, the son Antigonus, in the battle of Gaza in 312 BC. It is probable that Seleucus took part in the battle. Peithon, son of Agenor, whom Antigonus had nominated as the new satrap of Babylon, fell in the battle. The death of Peithon gave Seleucus an opportunity to return to Babylon.

Seleucus had prepared his return to Babylon well. After the battle of Gaza Demetrius retreated to Tripoli while Ptolemy advanced all the way to Sidon. Ptolemy gave Seleucus 800 infantry and 200 cavalry. He also had his friends accompanying him, perhaps the same 50 who escaped with him from Babylon. On the way to Babylon Seleucus recruited more soldiers from the colonies along the route. He finally had about 3,000 soldiers. In Babylon, Pethon's commander, Diphilus, barricaded himself in the city's fortress. Seleucus conquered Babylon with great speed and the fortress was also quickly captured. Seleucus' friends who had stayed in Babylon were released from captivity. His return to Babylon was afterwards officially regarded as the beginning of the Seleucid Empire and that year as the first of the Seleucid era.