Vespasian

Led a legion during the Roman invasion of Britain. Captured the Isle of Wight and over 20 fortified towns. Built a solid military reputation while serving an emperor, Claudius, who'd been installed as a joke by the Praetorian Guard.

Declared emperor by his legions in Egypt and Judaea during the civil war that followed Nero's suicide. He was the fourth emperor in a single year. His forces killed Vitellius in December.

Began construction of the Flavian Amphitheatre. We call it the Colosseum. He also reformed Roman finances after years of civil war excess and expanded imperial territory in Britain through his general Agricola.

Died at his summer home. His reported last words: "Dear me, I think I am becoming a god." Roman emperors were routinely deified after death. He knew the drill. Succeeded by his son Titus, making him the first emperor to pass power to a biological son.