Germanicus Caesar was the son of Tiberius' brother Drusus Sr. and Antonia the daughter of Mark Antony and Octavia. He distinguished himself on the battlefield many times, most notably in Germania where he inflicted serious defeats on the barbarian tribes and recovered the legionary standards lost in the catastrophic Varus disaster. He was chosen Tiberius' successor, but died of an unknown cause. His tremendous popularity helped his son Caius (Caligula) obtain the throne after Tiberius died.