From 1942, Camp Griffiss in Bushy Park became the site of a large US base, headquarters to a number of the Allied departments. The camp served as the European Headquarters for the USAAF from July 1942 to December 1944. General Dwight Eisenhower was averse to working in the centre of London during World War II. He decided instead to make Bushy Park the Supreme Headquarters Allied Expeditionary Force (SHAEF) centre for planning Operation Overlord, the code name for the Allied invasion of north-west Europe that began with the D-Day landings.[