On 15 August 1927 the XXII Corps was activated in the United States. On 13 October of that year XXII Corps was redesignated as III Corps. It was formally activated on 18 December 1927. Throughout much of the next decade, the corps was directed primarily with training and equipping smaller units, as the US military began slowly building in strength in response to international conflicts. In 1940, III Corps was tasked specifically with training newly formed US Army combat divisions in preparation for deployment. It was moved to Camp Hood, Texas for this mission.