Northern Mariana Islands · October 12, 1944 The Pacific Theater was the largest theater of World War II. Because of its watery expanse, Army aviation engineers and Seabees had to build more than 100 airfields on islands that dotted the Pacific, from New Guinea in the south, up through Guam, the Marianas, Iwo Jima, to Okinawa. On…
Honolulu, Hawaii · October 11, 1943 On this date in 1943 the USS Wahoo, a Gato-class (early World War II) submarine under Commander Dudley “Mush” Morton, was sunk in the La Pérouse (Soya) Strait, the channel that separates the northern Japanese island of Hokkaidō and the Russian Sakhalin Peninsula. Armed with ten torpedo tubes, the…
Tokyo, Japan · October 9, 1945 On this date in 1945 in Tokyo, Baron Kijuro Shidehara became Prime Minister of Japan at the head of a constitutional government committed to pursuing a peaceful future. Before the war Shidehara had been a prominent Japanese diplomat and a leading proponent of pacifism in Japan. On October 9 the…
Rome, Italy · October 8, 1941 Two months before Great Britain joined the United States in declaring war on Japan, Italian dictator Benito Mussolini chose to use this date in 1941 to blast the Japanese for not carrying their weight in the Tripartite Pact, a political, economic, and military agreement that Italy, Germany, and Japan…
Washington, D.C. · October 7, 1940 In the 1930s Japan’s statesmen and military leaders in China were acutely aware that their economy and armed forces were dependent on imports from the United States and its colonial friends who had holdings in the Asia Pacific region: the Americans in the Philippines, the British in Malaya (now…
Washington, D.C. · October 5, 1943 On this date in 1943 the Japanese news agency Domei acknowledged that the 8,000‑ton Konron Maru was sunk by an American submarine off the west coast of the Japanese home island of Honshu, with the loss of 544 lives. The steamer was sunk by the USS Wahoo using the new,…
Vichy, France · September 22, 1940 As early as June 1940, after French resistance to the German conquest of France crumbled, Japan made overtures to French authorities for permission to station troops in French Indochina (now Vietnam, Laos, and Cambodia) and for their warships to take up naval stations off northern Indochinese ports. On this…
Tokyo, Japan · September 6, 1941 On this date in 1941, in an Imperial Conference in Tokyo, Japanese officials concluded that if diplomatic measures could not reverse the U.S. policy of embargoing the export of various strategic raw materials (e.g., oil, iron ore, rubber, and scrap steel) to Japan by early October, then the government…
Kyūshū Island, Japan · August 25, 1945 On this date in 1945, ten days after Japan had agreed to unconditional surrender, two U.S. Army pilots flying P‑38 Lightnings on armed reconnaissance landed on Kyūshū Island, the southernmost Japanese home island, after one of the P‑38s ran low on fuel. The two pilots became the first Americans…
Quebec, Canada · August 18, 1943 On this date in 1943 in Quebec, Canada, President Franklin D. Roosevelt, British Prime Minister Winston Churchill, and Canadian Prime Minister Mackenzie King, along with their Combined Chiefs of Staff, set to work planning Operation Overlord, the 1944 invasion of German-occupied France. At this first of two Quebec conferences,…
