After Catiline was defeated Sittius sold his Spanish and Italian holdings and remained in Mauretania with his men and became a mercenary.
Publius Sittius is mentioned in De Bello Africo,[5] the history of the civil war in Africa, seen by a supporter of Caesar (Chs.
25) in the history joins forces with King Bogus of Mauritanea (or Bocchus II), attacking and forcing the surrender of Cirta, the richest town within the Kingdom of King Juba I, an enemy of Caesar who had already begun to send his army to support Scipio.
This event forced King Juba to adjust his plans and return part of his army to defend his territory thereby diminishing Scipio's available manning.
He notably assists Caesar through the campaign by diverting the attention and full strength of King Juba's forces (Ch.