and the Transportation Corps training center at Camp Gordon Johnston. But in these cases the commandant or commanding officer was appointed, and training activities were those specified by, the chief of the technical service concerned. The difference between Class I and Class IV installations was never settled. Operations Although he had an Assistant Chief of Staff, G-4, on the WDGS, it was to Somervell and the staff of ASF that Marshall turned to for advice on logistical matters, and it was Somervell who would attend the important wartime conferences. Logistics and strategy were interdependent; no strategic plan could be put into effect without due consideration of the logistical constraints. The ASF identified four major influences of logistics on strategy: The availability of supplies and resources in the United States at the time of the operation; Shipping and transport capacity in the United States; The capacity of the beaches and ports in the theater of operations, and the ability to move supplies from them to the combat areas; and The enemy's ability to interfere with the logistical support. Sledgehammer The most important strategic decision of the war was to concentrate on the war in Europe against Germany rather than the Pacific War against Japan. This made sound logistical sense: the distance across the Atlantic to the United Kingdom was half that across the Pacific to Australia, the largest ports in the United States were on the Atlantic coast, most of the industry was located in the northeast, and the railway network was oriented to the movement of goods there. This meant that forces could be deployed to the UK much faster than to the Pacific. Resources were not adequate to permit simultaneous action in both in 1942, so the Combined Chiefs of Staff decided to build up the forces in the UK. This activity up was codenamed Operation Bolero. Action was desirable to relieve the pressure on Britain and the Soviet Union. Bolero was to be followed by an emergency assault across the English Channel in the event of indications of a sudden German or Soviet collapse in 1942, codenamed Operation Sledgehammer, and a major one in 1943, codenamed Operation Roundup. Roundup required a million American troops to be moved to the UK by the 1 April 1943 target date. The ASF staff determined that the major constraints were the availability of shipping in the United States, and the capacity of