Who did Sir Stuart Peach replace as Chief of the Defence Staff in the summer of 2016?
Nick Houghton: General Sir John Nicholas Reynolds "Nick" Houghton, {'1': ", '2': ", '3': ", '4': "} (born 18 October 1954) is a retired senior British Army officer and former Chief of the Defence Staff of the British Armed Forces. Nick Houghton:  In January 2016, the government announced that Houghton would be replaced by Sir Stuart Peach as Chief of the Defence Staff in the summer of 2016.
i don't know