In 1945 Winston Churchill ordered the planning of "Operation Unthinkable", to launch an offensive against the Soviet Forces after the defeat of Germany to wrest Eastern Europe from the Soviet Union. Thompson was asked to create a plan to push back the Soviet Forces into Poland. The plan could only muster some 47 UK and US Divisions against 170 Soviet ones and controversially sought to rearm Wehrmacht and SS troops to close the gap. Widespread opposition from the UK Chiefs of Staff eventually saw it shelved.[6] He was awarded the Legion of Merit by the United States in 1947.[7]