play a prominent role in the defeat of Japan and the liberation of Britain's Asian colonies, especially Singapore. The Americans were unenthusiastic, suspecting that Churchill's intentions were primarily imperialist. Neither Franklin Roosevelt nor Harry Truman had any intention of helping to sustain the British Empire. In their successful campaigns of 1944 and the early months of 1945, the British Army and its allies had mostly cleared Burma of Japanese forces by May 1945. Rangoon had fallen to the Allies on 2 May following the Battle of Elephant Point. While Churchill hoped for a triumphant re-entry to Singapore, its recovery was logistically difficult and it remained under Japanese control until 12 September when it was finally recovered, following the Japanese surrender, by British forces in Operation Tiderace. Potsdam Conference Churchill was United Kingdom's representative at the post-war Potsdam Conference when it opened on 17 July. It was a "Big Three" event with Joseph Stalin representing the Soviet Union and President Harry Truman the United States. Ever since the conference was first proposed, Churchill had worried about the countries of eastern Europe, especially Poland, which had been overrun by the Red Army. He was accompanied at the sessions not only by Eden as Foreign Secretary but also by Attlee, pending the result of the general election held on 5 July. They attended nine sessions in nine days before returning to England for their election counts. After the landslide Labour victory, Attlee returned to Potsdam with Ernest Bevin as the new Foreign Secretary and there were a further five days of discussion. According to Eden, Churchill's performance at Potsdam was "appalling" because he was unprepared and verbose. Eden said Churchill upset the Chinese, exasperated the Americans and was easily led by Stalin, whom he was supposed to be resisting. This negative version of events is contradicted by Gilbert who describes Churchill's eager involvement in discussions with Stalin and Truman. Their main topics were the successful testing by the Americans of the atom bomb and the demarcation of a new frontier between Poland and East Germany. Stalin insisted on extending the frontier westward to the Oder and Western Neisse rivers, forming the Oder–Neisse line and thus incorporating most of Silesia into Poland. Churchill and Truman opposed this proposal but to no avail. Gilbert does recount that Field Marshal Montgomery was worried about Churchill's health, saying in a letter that Churchill had "put on ten