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The Imperial Japanese Navy launches, without warning or declaration of war, a devastating attack against the American base in Hawaii. However, none of the US Navy aircraft carriers are damaged as they are all outside the base. The Pacific War begins.
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Half a year after the start of the war, the American carrier force defeated the Japanese squadron in a decisive naval air battle, which was looking for a final encounter. The Japanese carriers "Kaga", "Akagi", "Soyu" and "Hiryu" were sunk and Japan lost the initiative in the Pacific.
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The long battle of Guadalcanal, in the Solomon Islands archipelago, which ended with the victory of the Americans, was the first setback of the Japanese army and would be the prologue of an endless series of Japanese defeats, as a result of the application of the American technique of jumping from island to island towards metropolitan Japan.
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Faced with the American landing in the Philippines, the Japanese respond by launching a powerful naval air operation that becomes the largest battle of its kind in the entire war. The Japanese, having been defeated, totally lost all capacity to confront the American navy.
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The use of the nuclear weapon not only led to Japan's unconditional surrender, and thus to the end of World War II, but also ushered in a new era.