 Complete the following phrase:  At first Germany was very successful in its military operations. In less than three months April  June 1940, Germany conquered Denmark, Norway, the Low Countries, and France. The unexpectedly swift defeat of France resulted in an upswing in Hitlers popularity and an upsurge in war fever. Hitler made peace overtures to the new British leader Winston Churchill in July 1940, but Churchill remained dogged in his defiance. Churchill had major ficial, military, and diplomatic help from President Franklin D. Roosevelt in the U.S. Hitlers bombing campaign against Britain September 1940May 1941 failed. Some 43,000 British civilians were killed and 139,000 wounded in the Blitz; much of London was destroyed, with 1,400,245 buildings destroyed or damaged. Germanys armed forces 