He was mentioned in dispatches six times during World War I. When William Robertson was replaced as CIGS in early 1918 by Sir Henry Wilson, Radcliffe was appointed Director of Military Operations at the War Office.
Radcliffe was frequently mentioned in dispatches during World War I. Upon William Robertson's departure as CIGS in early 1918, he was succeeded by Sir Henry Wilson, and subsequently, Radcliffe took on the role of Director of Military Operations at the War Office.