At the beginning of the 20th century, the military importance of the Hawaiian Islands became clear. Oahu in particular was a key bastion in projecting America's military power in the Pacific. The island was turned into a military fortress and yet it also became the site of one of America's greatest defensive failures, the Japanese attack of December 7, 1941. By the end of World War II, the harbor itself was the most heavily defended in the world, and the island had earned the sobriquet "Fortress Oahu". This title documents the development of the coastal, air and land defense systems that served to protect Pearl Harbor and Honolulu from 1907 to 1950, and seeks to understand why these failed at a critical point.

The great seaport of New York, one of the largest and busiest natural harbors in the world, was defended for nearly four centuries by a series of more than sixty coastal fortifications. These fortifications were occupied by the Dutch, then the British, and finally, the Americans, who after winning their independence, needed to protect the country they had established. New York City's Harbor Defenses, with more than two hundred vintage photographs, reveals the unusual history of these coastal and island forts and tells of the men and women who served at them during peacetime and while the country was at war. Most of these fortifications are no longer active, but they can still be visited. Gone are the mighty guns, some of which could fire a twenty-four-hundred-pound shell a distance of twenty-six miles. Many of the buildings constructed during national emergencies have been leveled, and the millions of soldiers who lived, trained, and served their country there are absent. This visual history shows what once were the extensive fortifications that defended New York City's harbor.