Boris III of Bulgaria
The King completed his education at Cambridge University before being commissioned in the Royal Air Force. In mid-1941, the Yugoslav government-in-exile opened talks with the Greek government-in-exile for a post-war confederation––the Balkan Union––that would unite Yugoslavia, Greece and Bulgaria once King Boris III of Bulgaria was overthrown. The Greek prime minister Emmanouil Tsouderos supported the confederation plan, but objected to the Yugoslav plans to bring in Bulgaria and for the proposed confederation to have an executive government in charge of all economic, foreign policy and military questions, leading Tsouderous to ask the British Foreign Secretary Sir Anthony Eden to mediate.