page_title: Joint Chiefs of Staff
section_title: World War II
hierarchical_section_title: Joint Chiefs of Staff / History / World War II
caption_attribution_description: World War II Joint Chiefs of Staff (circa 1943). From left to right are: Gen. Henry H. Arnold, Chief of Staff, U.S. Army Air Forces; Adm. William D. Leahy, Chairman, Joint Chiefs of Staff; Adm. Ernest J. King, Chief of Naval Operations and Commander in Chief, U.S. Fleet; and Gen. George C. Marshall, Chief of Staff, U.S. Army.
context_page_description: The Joint Chiefs of Staff is the body of the most senior uniformed leaders within the United States Department of Defense, which advises the president of the United States, the secretary of defense, the Homeland Security Council and the National Security Council on military matters. The composition of the Joint Chiefs of Staff is defined by statute and consists of a chairman, a vice chairman, the service chiefs of the Army, Marine Corps, Navy, Air Force, Space Force, and the chief of the National Guard Bureau. Each of the individual service chiefs, outside their JCS obligations, work directly under the secretaries of their respective military departments, e.g. the secretary of the Army, the secretary of the Navy, and the secretary of the Air Force.
  Following the Goldwater–Nichols Act in 1986, the Joint Chiefs of Staff do not have operational command authority, either individually or collectively, as the chain of command goes from the president to the secretary of defense, and from the secretary to the regional combatant commanders.
context_section_description: U.S. president Franklin D. Roosevelt and British prime minister Winston Churchill established the Combined Chiefs of Staff (CCS) during the 1942 Arcadia Conference. The CCS would serve as the supreme military body for strategic direction of the joint U.S.–UK war effort.
  The UK portion of the CCS would be composed of the British Chiefs of Staff Committee, but the United States had no equivalent body. The Joint Board's lack of authority made it of little use to the CCS, although its 1935 publication, Joint Action of the Army and Navy, did give some guidance for the joint operations during World War II. The Joint Board had little influence during the war and was ultimately disbanded in 1947.
  As a counterpart to the UK's Chiefs of Staff Committee in the CCS, and to provide better coordinated effort and coordinated staff work for America's military effort, Admiral William D. Leahy proposed a "unified high command" in what would come to be called the Joint Chiefs of Staff. Modeled on the British Chiefs of Staff Committee, the JCS' first formal meeting was held on 9 February 1942, to coordinate operations between War and Navy Departments. The official history of the Army Air Forces noted that although there was "no official charter establishing this committee...by the end of February it had assumed responsibilities toward the American war effort comparable to the CCS on the combined level." On 20 July 1942, Admiral Leahy became the "Chief of Staff to the Commander in Chief", with all individual service chiefs operating under his authority.
  The first members of the Joint Chiefs of Staff were:
  As the table indicates, each of the members of the original Joint Chiefs was a four-star flag or general officer in his respective service branch. By the end of the war, however, each had been promoted: Leahy and King to Fleet Admiral; Marshall and Arnold to General of the Army. Arnold was later appointed to the grade of General of the Air Force.
  One of the Joint Chiefs of Staff's committees was the Joint Strategic Survey Committee (JSSC). The JSSC was an extraordinary JCS committee that existed from 1942 until 1947. It was "one of the most influential planning agencies in the wartime armed forces". Members included Lieutenant General Stanley D. Embick, U.S. Army, chairman, 1942–1946, Vice Admiral Russell Willson, U.S. Navy, 1942–1945, Vice Admiral Theodore Stark Wilkinson, U.S. Navy, 1946, and Major General Muir S. Fairchild, U.S. Army Air Force, 1942–?.
caption: Joint Chiefs of Staff meeting (circa 1943). From left to right are: Gen. Henry H. Arnold, Chief of the Army Air Forces; Adm. William D. Leahy, Chief of Staff to the Commander in Chief of the Army and Navy; Adm. Ernest J. King, Commander in Chief, U.S. Fleet and Chief of Naval Operations; and Gen. George C. Marshall, Chief of Staff of the United States Army.
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