The British diplomatic mission to Belgium, under Ambassador Lancelot Oliphant, was attached to the government in exile. In March 1941, the Americans also sent an Ambassador, Anthony Biddle Jr., to represent the United States to the governments in exile of Belgium, the Netherlands, Poland and Norway. The Soviet Union, which had broken off diplomatic relations with Belgium in May 1941 (heavily influenced by the then-in force Nazi-Soviet Pact), re-established its legation to the government in exile in the aftermath of the German invasion and eventually expanded it to the rank of Embassy in 1943.