During the 180s, Pertinax took a pivotal role in the Roman Senate until the praetorian prefect Sextus Tigidius Perennis forced him out of public life. He was recalled after three years to Britain, where the Roman army was in a state of mutiny. He tried to quell the unruly soldiers there but one legion attacked his bodyguard, leaving Pertinax for dead. When he was forced to resign in 187, the reason given was that the legions had grown hostile to him because of his harsh rule.