Maude arrived to catch the end of the British failure at the Siege of Kut where he was promoted to lieutenant-general, replacing General George Gorringe as commander of the newly dubbed Tigris Corps (III Indian Army Corps) in July 1916. Despite being instructed to do no more than hold the existing line, Maude set about to re-organising and re-supplying his mixed British and Indian forces. He was made commander of all Allied forces in Mesopotamia in late July 1916, replacing Sir Percy Lake.