The Berlin crisis brought III Corps back to active duty for the fourth time on 1 September 1961. Units participated in an intensive training program and were operationally ready by December 1961. In February 1962, the Department of the Army designated III Corps as a unit of the U.S. Strategic Army Corps and in September 1965, assigned III Corps to the U.S. Strategic Army Forces. Throughout much of the 1960s, III Corps and its subordinate units trained for rapid deployment to Europe in the event of an outbreak of war there.