After Vespasian had established himself as emperor, Agricola was appointed to the command of the "Legio XX Valeria Victrix", stationed in Britain, in place of Marcus Roscius Coelius, who had stirred up a mutiny against the governor, Marcus Vettius Bolanus. Britain had revolted during the year of civil war, and Bolanus was a mild governor. Agricola reimposed discipline on the legion and helped to consolidate Roman rule. In 71, Bolanus was replaced by a more aggressive governor, Quintus Petillius Cerialis, and Agricola was able to display his talents as a commander in campaigns against the Brigantes in northern England.