Someone here suggested an very interesting POD. That would be having the Commonwealth forces successfully defend Malaysia when the Japanese attacked it. This would have prevented the conquest of the Dutch East Indies and thereby cut off the Japanese supply of oil. If this happened a guy on the Ark speculated that Japan would have surrender in 1943. In this scenario, China and Korea would be occupied by US forces. This would help Jaing but I believe only buy him time. The communists would take power in 1951 or so. The US would then rush troops to Korea. There is no Korean War and the US bases are by the Chinese border. If recall Spartan or Spartan Phalanx on DW, he met his wife when he was stationed in Korea. ITTL it is more difficult for them to meet.
The European War is profoundly affected. By 1944, the entire Commonwealth and US forces are focused on Germany. I think the US and UK liberate Prague and Warsaw in November 1944. Poland and the Czech Republic ( There is a not so velvet divorce.) are the front line nations of NATO. Germany surrenders in December 1944. Maybe with less war related stress FDR lives longer.