At the Tehran and Yalta Conferences, Stalin promised to join his allies in the Pacific War in two to three months after victory in Europe. On 8 August 1945, two days after the first atomic bomb was dropped on Hiroshima, but before the second bomb was dropped at Nagasaki, the USSR declared war on Japan. As war began, the Commander-in-Chief of Soviet Forces in the Far East, Marshal Aleksandr Vasilevsky, called on Koreans to rise up against Japan, saying "a banner of liberty and independence is rising in Seoul".