7-8 DEC 1941: World War 2 and Japanese aircraft attack the American Pacific Fleet at Pearl Harbor, Hawaii. With the Japanese attack on European possessions in Asia the Second World War was now a truly global conflict. The road to war between Japan and the United States began in the 1930s when differences over China drove the two nations apart. In 1931 Japan conquered Manchuria, which until then had been part of China. In 1937 Japan began a long and ultimately unsuccessful campaign to conquer the rest of China.
Then in 1940, the Japanese government allied itself with Nazi Germany in the Axis Alliance, and, in the following year, occupied all of Indochina.
The United States, which had important political and economic interests in East Asia, was alarmed by these Japanese moves. The U.S. increased military and financial aid to China, embarked on a program of strengthening its military power in the Pacific, and cut off the shipment of oil and other raw materials to Japan.
Because Japan was poor in natural resources, its government viewed these steps, especially the embargo on oil, as a threat to the nation’s survival. Japan’s leaders responded by resolving to seize the resource-rich territories of Southeast Asia, even though that move would certainly result in war with the United States.
Understanding this, Japanese leadership developed a bold plan for a surprise attack. Approved just weeks earlier, the Japanese Imperial Navy Strike Group sailed toward Pearl Harbor, 73 years ago today.
The Pearl Harbor naval base was recognized by both the Japanese and the U.S. Navies as a potential target for hostile carrier air power. Its distance from Japan and shallow harbor, the certainty that Japan’s navy would have many other pressing needs for its aircraft carriers in the event of war, and a belief that intelligence would provide warning, persuaded senior U.S. officers the prospect of an attack on Pearl Harbor could be safely discounted.
During the interwar period, the Japanese had reached similar conclusions. But their pressing need for secure flanks during the planned offensive into Southeast Asia and the East Indies spurred the dynamic commander of the Japanese Combined Fleet, Adm. Isoroku Yamamoto, to revisit the issue.
His staff found the assault was feasible, given the greater capabilities of newer aircraft types, modifications to aerial torpedoes, a high level of communications security, and a reasonable level of good luck. The key elements in Yamamoto’s plans were meticulous preparation, the element of surprise, and the use of aircraft carriers and naval aviation on an unprecedented scale. In the spring of 1941, Japanese carrier pilots began training in the special tactics called for by the Pearl Harbor attack plan.
In October 1941 the naval general staff gave final approval to Yamamoto’s plan. It centered around six heavy aircraft carriers accompanied by 24 supporting vessels. A separate group of submarines was to sink any American warships that escaped the Japanese carrier force. More; http://ow.ly/XRAX30h3TkG