In February of 1945, Franklin D. Roosevelt traveled to Yalta and ceded geopolitical control of Eastern Europe to Joseph Stalin. At the conference, Winston Churchill could do nothing. In return for the Soviet dictator’s promise of allowing Poland to hold elections to set its postwar political course (and a vague assurance of democratic elections in the other countries occupied by Red Army troops at the close of World War II), the allies let him keep possession of the eastern part of Poland. This was, in effect, ratification of Stalin’s 1939-1941 territorial gains as the ally of Adolf Hitler.
Churchill had consistently attempted to block Stalin’s expansionism, but with the American President distancing himself from Britain, Stalin had little trouble setting himself up for a postwar empire taking in not only Eastern but parts of Central Europe.
Today, with the “framework of understanding” between the United States and Iran on Iran’s nuclear ambitions, Barack Obama has devised his own Yalta.