Quintus Lutatius Catulus (149–87 BC) was a consul of the Roman Republic in 102 BC. His consular colleague was Gaius Marius. During their consulship the Cimbri and Teutones marched south again and threatened the Republic. While Marius marched against the Teutones in Gaul, Catulus had to keep the Cimbri from invading Italy. In this he failed; the Cimbri succeeded in invading the Po Valley. In 101 BC Catulus, as proconsul, continued the war against the Cimbri. Marius, elected consul for the fifth time, joined him and together they campaigned against the Germanic invaders in the Po Valley. At the Battle of Vercellae Marius and Catulus decisively defeated the Cimbri and ended the Germanic invasion. After Vercellae the two feuded and Catulus sided with Sulla in the civil war of 88–87 BC. When the Marians regained control of Rome in 87 BC, Catulus committed suicide rather than face prosecution.