Anglo-American relations(1964-1974) was eroded due to the Detent of the Cold War, multi-polarization of the international relationship, reduction of British duty in western alliance as well as the reposition of US foreign policy. However, as the bipolar military confrontation layout did not change, Britain could contribute much to the transatlantic alliance; Anglo-American exchange in defense and cooperation still went in an orderly way; those factors helped Anglo-US allianc...