 Complete the following phrase:  With the defeat and death of Pompey in 48 BC, Libo attached himself to Pompeys son, Sextus Pompey. Sextus was Libos son-in-law due to his marriage to Libos daughter Scribonia. In 40 BC, Sextus sent him as an unofficial envoy to Mark Antony in Greece, seeking an alliance against Octavian later known as Augustus, who had just defeated Antonys partisans in the 