By the spring of 40 BC, Antony left Egypt due to troubles in Syria, where his governor Lucius Decidius Saxa was killed and his army taken by Quintus Labienus, a former officer under Cassius who now served the Parthian Empire. Cleopatra provided Antony with 200 ships for his campaign and as payment for her newly acquired territories. She would not see Antony again until 37 BC, but she maintained correspondence, and evidence suggests she kept a spy in his camp. By the end of 40 BC, Cleopatra had given birth to twins, a boy named Alexander Helios and a girl named Cleopatra Selene II, both of whom Antony acknowledged as his children. Helios (the Sun) and Selene (the Moon) were symbolic of a new era of societal rejuvenation, as well as an indication that Cleopatra hoped Antony would repeat the exploits of Alexander the Great by conquering the Parthians.