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.