A ƙarshen Fabrairun 1946, George F. Kennan's "Long Telegram" daga Moscow zuwa Washington ya taimaka wajen faɗar da gwamnatin Amurka da ke ƙara tsaurara a kan Soviets, wanda zai zama tushen dabarun Amurka game da Tarayyar Soviet don tsawon lokacin Cold War. Gwamnatin Truman ta karɓi telegram saboda alkawuran da Stalin ya karya game da Turai da Iran. Bayan mamayewar Anglo-Soviet na WWII na Iran, Sojojin Red Army sun mamaye kasar a arewacin arewa da kuma Birtaniyya a kudu. Amurka da Birtaniya sun yi amfani da Iran don samar da Tarayyar Soviet, kuma Allies sun amince su janye daga Iran a cikin watanni shida bayan dakatar da tashin hankali. Duk da haka, lokacin da wannan wa'adin ya zo, Soviets sun kasance a Iran a karkashin sunan Jamhuriyar Jama'ar Azerbaijan da kuma
Jamhuriyar Kurdawa ta Mahabad. Ba da daɗewa ba bayan haka, a ranar 5 ga Maris, tsohon firaministan Burtaniya Winston Churchill ya ba da sanannen jawabinsa na "Iron Curtain" a Fulton, Missouri. Jawabin ya yi kira ga kawancen Anglo-American da Soviets, wanda ya zarge su da kafa "labule na baƙin ƙarfe" da ke raba Turai daga "Stettin a cikin Baltic zuwa Trieste a cikin Adriatic".