The Battle of the Nile in 47 BC saw the combined Roman–Egyptian armies of Julius Caesar and Cleopatra VII defeat those of the rival Queen Arsinoe IV and King Ptolemy XIII and secure the throne of Egypt. After pursuing his rival Pompey to Egypt, Caesar, recently victorious in a civil war closer to home, became entwined in the Alexandrine civil war after his rival, Pompey Magnus, was killed by King Ptolemy XIII in an attempt to please Caesar.