During the Hundred Days, Barrois rallied to Napoleon and was given command of the 1st Young Guard Division and led it in the Waterloo Campaign. The division consisted of the 1st and 3rd Tirailleurs and the 1st and 3rd Voltigeurs. Barrois led the Tirailleurs at the Battle of Ligny. At the Battle of Waterloo on 18 June 1815 he was shot in the left shoulder while directing the defense of Plancenoit. He immediately went on leave to have his injury tended. He was placed on retired status on 1 January 1825. Barrois returned to active duty in 1830 to command the 3rd Division and serve as inspector general of infantry. In August 1831 he was part of the French army that intervened in the Belgian Revolution. In 1836 he was awarded the Grand Cross of the Legion of Honor. Barrois is inscribed on the west pillar of the Arc de Triomphe. He is buried in the 27th division of the Père Lachaise Cemetery in Paris.