and 12,574 for the Adjutant General. Of these, 16,305 were in ASF headquarters in Washington, DC. Technical Services When the Services of Supply was formed on 9 March 1942, six supply arms and services became part of the new organization: the Corps of Engineers, Signal Corps, Ordnance Department, Quartermaster Corps, Chemical Warfare Service and the Medical Department. In April 1942, shortly after they became part of the USASOS, they were redesignated "supply services". This term was replaced with "technical services" in April 1943, which, it was felt, better described their function. A seventh technical service, the Transportation Corps, was established as the Transportation Division on 28 February 1942 under the authority of Executive Order 9082. It was renamed the Transportation Service in April 1942 and became a corps in its own right on 31 July 1942, with its own chief, replacement training center, officer candidate school and distinctive branch insignia. The Transportation Corps took over control of the ports of embarkation and regulating points from the Quartermaster Corps, and on 16 November, and the Military Railway Service was transferred from the Corps of Engineers to the Transportation Corps. Aside from that, the only significant changes in the responsibilities of the technical services during World War II were the transfer of the Construction Division of the Quartermaster Corps to the Corps of Engineers, which occurred on 1 December 1941, before the creation of the USASOS, and the transfer of responsibilities for the development, procurement, storage and maintenance of motor vehicles from the Quartermaster Corps to the Ordnance Department in July 1942. Each technical service had a chief based in Washington, DC, with a large staff, and field installations scattered across the country. On 31 July 1943, the seven technical services controlled 728,796 military and civilian personnel in the United States, comprising 48 percent of the ASF. There were 261,118 in the Ordnance Department; 149,121 in the Transportation Corps; 103,450 in the Quartermaster Corps; 90,493 in the Corps of Engineers (including those assigned to the Manhattan District); 72,109 in the Signal Corps; 35,539 in the Chemical Warfare Service; and 16,936 in the Medical Department. Of these, 16,904 worked in the offices of the chiefs of the technical services. Unlike the chiefs of the four combat arms, who had their offices abolished and their authority transferred to the Chief of Army Ground Forces, neither the duties nor the structure of the technical services