The Common Struggle Against Fascism

Cipher telegram from Konstantin Umansky, plenipotentiary representative of the USSR in the USA, to the People’s Commissariat of Foreign Affairs of the USSR on his conversation with US Under Secretary of State Sumner Welles on the possibility of a German attack on the USSR

1 March 1941
Archive of Foreign Policy of the Russian Federation

"...According to secret information available to the American government... German military plans envisage gaining victory over England, despite the support given to the latter by the United States, and then attacking the USSR. The plans of attack have been developed by the German leadership in great detail."