Chamberlain remained at the India Office after David Lloyd George succeeded Asquith as Prime Minister in late 1916, but following inquiries into the failure of the Mesopotamian campaign (undertaken by the separately-administered Indian Army) in 1915, including the loss of the British garrison during the Siege of Kut, Chamberlain resigned his post in 1917; as the minister ultimately responsible, the fault lay with him. He was widely acclaimed for such a principled act.