Guam had been U.S. Territory for nearly half a century when it was overrun by the Japanese in 1941. It took considerable effort to take it back.
Even today, the mysterious flight Nazi official Rudolf Hess to Scotland on May 10, 1941, remains shrouded in secrecy.
The great B-29 Tokyo Firebomb Mission of March 1945 killed more than 100,000 Japanese but may have won the war in the Pacific.