The Special Relationship is a term used to describe the close relations between the United States and the United Kingdom. It applies particularly to the governmental realms of foreign, defense, security, and intelligence policy, but it also captures a broader sense that both public and private relations between the United States and Britain are particularly deep and close. The Special Relationship is thus a term for a reality that came into being over time as the result of political leadership as well as ideas and events outside the formal arena of politics. After the political break of the American Revolution and in spite of sporadic cooperation in the 19th century, it was not until the Great Rapprochement of the 1890s that the idea that Britain and the United States had a special kind of relationship took hold. This decade, in turn, created the basis for the Special Relationship, a term first used by Winston Churchill in 1944. Churchill did the most to build the relationship, convinced as he was that close friendship between Britain and the United States was the cornerstone of world peace and prosperity. During and after the Second World War, many others on both sides of the Atlantic came to agree with Churchill. The post-1945 era witnessed a flowering of the relationship, which was cemented—not without many controversies and crises—by the emerging Cold War against the Soviet Union. After the end of the Cold War in 1989, the relationship remained close, though it was severely tested by further security crises, Britain’s declining defense spending, the evolving implications of Britain’s membership in the European Union, the relative decline of Europe, and an increasing U.S. interest in Asia. Yet on many public and private levels, relations between the United States and Britain continue to be particularly deep, and thus the Special Relationship endures.