During the Waterloo Campaign, General Jean Rapp rallied to Napoleon Bonaparte and was given command of the V Corps (also known as the Army of the Rhine), consisting of about 20,000 men. He was ordered to observe the border near Strasbourg, and to defend the Vosges. Ten days after Waterloo (in which his corps took no part), he met the III Corps of the Austrian Upper Rhine Army under the command of the Crown Prince of Württemberg near Strasbourg and defeated them at the Battle of La Suffel.