He was only two years old when his father was deposed by the nobles, who set up Robert I in his place. When he was only three years old, Robert died and was replaced by Rudolph, duke of Burgundy. Rudolph's ally, a Carolingian himself, Count Herbert II of Vermandois, took Charles captive by treachery and the young Louis's mother took the boy "over the sea" to the safety of England, hence his nickname.