Combined Chiefs of Staff

The Combined Chiefs of Staff (CCS) was the supreme military staff for the Western Allies during World War II.

It emerged from the meetings of the Arcadia Conference in December 1941. The CCS was constituted from the British Chiefs of Staff Committee and the American Joint Chiefs of Staff that was created, in part to present a common front to the British Chiefs of Staff, in early 1942 holding its first formal meeting on 9 February to coordinate U.S. military operations between War and Navy Departments.

The CCS charter was approved by President Roosevelt 21 April 1942. The American members of the CCS were General George C. Marshall, the United States Army chief of staff, the Chief of Naval Operations, Admiral Harold R. Stark (replaced early in 1942 by Admiral Ernest J. King); and the Chief (later Commanding General) of the Army Air Forces, Lt. Gen. Henry H. Arnold. In July 1942 a fourth member was added, the President's personal Chief of Staff, Admiral William D. Leahy.

On the British side the Chiefs of Staff only normally attended during the heads of states' conferences. Instead the British Joint Staff Mission was permanently situated in Washington, D.C. to represent British interests. The British members were a representative of the Prime Minister, in his capacity as Minister of Defence, and the Chiefs of Staff Committee, which consisted of the First Sea Lord, the Chief of the Imperial General Staff, and the Chief of the Air Staff, or the Washington representative of each. The representative of the Prime Minister was Field Marshal Sir John Dill and after his death Field Marshal Sir Henry Maitland Wilson. The Washington representatives of the Chiefs of Staff Committee, who normally met with the United States members in place of their principals, were the senior officers from their respective services on the British Joint Staff Mission in Washington. In the course of the war, the First Sea Lord was represented by Admiral Sir Charles Little, Admiral Sir Andrew Cunningham, Admiral Sir Percy Noble, and Admiral Sir James Somerville; the Chief of the Imperial General Staff was represented by Lt. Gen. Sir Coville Wemyss and Lt. Gen. G. N. Macready; and the Chief of the Air Staff was represented by Air Marshal D. C. S. Evill, Air Marshal Sir William L. Welsh, and Air Marshal Douglas Colyer. Dill, a close friend of Marshall, often took the American position and prevented a polarizations that would undermine effectiveness.

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