Step 1: The Invitation Following the Yalta Conference in February 1945, the "Big Three"—Franklin D. Roosevelt (USA), Winston Churchill (UK), and Joseph Stalin (USSR)—issued invitations to countries that had declared war on Germany and Japan by March 1, 1945.

Step 1: The Invitation Following the Yalta Conference in February 1945, the "Big Three"—Franklin D. Roosevelt (USA), Winston Churchill (UK), and Joseph Stalin (USSR)—issued invitations to countries that had declared war on Germany and Japan by March 1, 1945.