Ten hours after the attack on Pearl Harbor, "another Pearl Harbor" of even more devastating consequence for American arms occurred in the Philippines, 4,500 miles to the west. On December 8, 1941, at 12.35 p.m., 196 Japanese Navy bombers and fighters crippled the largest force of B-17 four-engine bombers outside the United States and also decimated their protective P-40 interceptors. The sudden blow allowed the Japanese to rule the skies over the Philippines, removing the only effective barrier that stood between them and their conquest of Southeast Asia. This event has been called "one of...