Main Findings During World War II, the United States and the Empire of Japan each developed plans and marshaled forces for a climactic battle over Taiwan. Both sides regarded the island as an area of strategic consequence. Code-named Operation CAUSEWAY, the American invasion of Taiwan would have been the largest amphibious campaign in the Pacific Theater and the largest sea-air-land engagement in world history. Strategists in Japan believed the attack was coming and designed a blueprint for the defense of Taiwan and the Ryukyu Islands called SHO-GO(捷 2 号作戦, or…