sentences:  Marcus was renowned for being a man of gallantry and warm temperament.He was the brother of Porcia Catonis, who was first married to Marcus Calpurnius Bibulus (co-consul with Caesar in 59 BC); she later married their half-cousin (on the maternal side) Marcus Junius Brutus.Marcus fought in the Battle of Thapsus, and after being defeated by Caesar's forces his father Cato committed suicide in 46 BC.