 His involvement in the first civil war against his father's reign was limited, but in the second his elder brothers, Lothair I, then King of Italy, and Pepin I, Duke of Aquitaine, persuaded him to invade Alamannia which their father had given to their young half-brother Charles the Bald, by promising to give him the land in the new partition they would make after a victory.In 832 he led an army of Slavs into Alamannia, but was driven back by his father.Louis the Pious disinherited him, but to no effect; the emperor was soon captured by his own rebellious sons and deposed.