text: Also , in Britain in 184 , the governor Ulpius Marcellus re-advanced the Roman frontier northward to the Antonine Wall , but the legionaries revolted against his harsh discipline and acclaimed another legate , Priscus , as emperor .
simplified: In Britain in 184 , the governor Ulpius Marcellus pushed the Roman frontier north to the Antonine Wall , but the soldiers revolted against his harsh discipline .