While in Britain, Pompey's wife & Caesar's daughter Julia, died in childbirth. Trying to regain Pompey's support, Caesar offered him Octavia, his great-niece, in marriage. In 53 BC, Crassus was killed while invading Parthia. This was a failed mission. Pompey was appointed sole consul and he married Cornelia, the daughter of Scipio, Caesar's political rival.