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The Marianas archipelago consists of fifteen volcanic islands located 3,300 miles west of Hawaii and 1,500 miles east of the Japan or the Philippines. In the summer of 1944 the Mariana Islands, a vital Japanese station on their internal lines of shipping and communication, became the next vital step in the U.S. war against Japan. Continuing the advance in the Central Pacific by Admiral Chester Nimitz' naval forces made the Marianas the next stop on the path to Tokyo. Bases in the Marianas would put U.S. Army Air Corps B-29 bombers within range of the Japanese home islands for the first time.
Background to the Invasion of the Marianas
To seize the Marianas, in June 1944 American forces executed Operation Forager, a joint operation involving ground units of U.S. Marines and U.S. Army, supported by naval gunfire and air support, with the objective of the capture of Saipan, Tinian, and Guam, the main islands of the Marianas. The Japanese attempt to interdict the invasion with a decisive attack on the U.S. Fifth Fleet in the Battle of the Philippine Sea resulted in a disastrous loss of Japanese planes and pilots without impeding the invasion.
The Invasions of Saipan, Guam, and Tinian
Each of the major islands of the Marianas was invaded and captured in turn:
Importance of the Marianas Campaign
The American victory in the Marianas was the first combined operation executed by Army, Navy, Marine Corps, and Army Air Force units. The success set the pattern for the further development of joint operations in the Central and Southwest Pacific. The loss of the Marianas and the crippling of Japanese sea power in the Battle of the Philippine Sea, eliminated any possibility of a Japanese recovery and resurgence. With the Marianas in American control, Japan's sea lines of communication were cut off from natural resources and their own military forces in Southeast Asia. Soon B-29 Superfortress bombers based in the Marianas began to pound the Japanese home islands as U.S. forces closed the ring ever tighter on Japan.
Recommended Books about the Invasion of the Marianas
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