 In October 41, Antony requested Rome's chief eastern vassal, the queen of Ptolemaic Egypt Cleopatra, meet him at Tarsus in Cilicia.Antony had first met a young Cleopatra while campaigning in Egypt in 55 BC and again in 48 BC when Caesar had backed her as queen of Egypt over the claims of her half-sister Arsinoe.Cleopatra would bear Caesar a son, Caesarion, in 47 BC and the two living in Rome as Caesar's guests until his assassination in 44 BC.