Relations between the Soviet Union and the United States were fully established from 1933 until 1991 as the succeeding bilateral ties to those between the Russian Empire and the United States, which lasted from 1809 until 1917; they were also the predecessor to the current bilateral ties between the Russian Federation and the United States that began in 1992 after the end of the Cold War.

The relationship between the Soviet Union and the United States was largely defined by mistrust and hostility. The invasion of the Soviet Union by Germany as well as the attack on the U.S. Pacific Fleet at Pearl Harbor by Imperial Japan marked the Soviet and American entries into World War II on the side of the Allies in June and December 1941, respectively. As the Soviet–American alliance against the Axis came to an end following the Allied victory in 1945, the first signs of post-war mistrust and hostility began to immediately appear between the two countries, as the Soviet Union militarily occupied Eastern European countries and turned them into satellite states, forming the Eastern Bloc. These bilateral tensions escalated into the Cold War after the creation of the entire Korean Peninsula divided into Soviet-backed North Korea and the US-backed South Korea as one of the earliest flashpoints in 1948 that led to the Korean War for over three years from 1950 to 1953 where the conflict had never technically ended, a decades-long period of tense hostile relations with short phases of détente that ended after the collapse of the Soviet Union and emergence of the present-day Russia at the end of 1991.

History

Pre-World War II relations (1917–1939)

Provisional Government

In wake of the February Revolution and Tsar Nicholas II's abdication, Washington was still largely ignorant of the underlying fractures in new Russian Provisional Government and believed that Russia would rapidly evolve into a stable democracy enthusiastic to join the western coalition in the war against Germany. With the establishment of the Provisional Government, United States Ambassador to Petrograd David R. Francis immediately requested from Washington authority to recognize the new government arguing the revolution "is the practical realization of that principle of government which we have championed and advocated. I mean government by consent of the governed. Our recognition will have a stupendous moral effect especially if given first." and was approved on 22 March 1917 making the United States the first foreign government to formally recognize the new government. A week and a half later when President Woodrow Wilson addressed Congress to request a declaration of war against Germany, Wilson remarked "Does not every American feel that assurance has been added to our hope for the future peace of the world by the wonderful and heartening things that have been happening within the last few weeks in Russia? Russia was known by those who knew it best to have been always in fact democratic at heart... Here is a fit partner for a League of Honor."