But Caesar still needed money and assumed the role of arbiter over the dispute between Cleopatra and her brother to gain position in the battle for control of the Egyptian treasury. Once Cleopatra became his mistress, Ptolemy and his minions rebelled, were defeated, and the king was killed. The end result was an alliance with Egypt, rather than annexation, because Caesar knew he could not trust any governor to manage an Egyptian province.
Ignoring the unrest in Rome, Caesar decided to seek additional tribute in the east, so he headed north with the goal of reducing Pontus as punishment for the murder of Crassus. Then, after its defeat on August 1, 47 B.C, he headed home via Athens and Tarentum, where he met with Cicero.