Battle of Okinawa

Okinawa Island is the largest of the Ryukyu Islands of Japan. For 82 days in 1945, American and Japanese forces battled for control of the island in the largest amphibious assault in the Pacific Theater of World War II.

Okinawa Island in The Man With the Iron Heart
The stiff resistance the Japanese gave the Americans at Okinawa Island greatly impressed Reinhard Heydrich, who hoped that the drain on U.S. resources would benefit his German Freedom Front. The kamikaze tactics used by the Japanese also inspired him.