The United States devoted massive resources to the invasion of Normandy but during the same month still was able to conduct one of the biggest amphibious landings of the Pacific war.
Most people recognize 6 June 1944 as D-Day, when Americans, British, and Canadians, with assistance from the forces of 17 other nations, assaulted northern France in Operation Neptune, the initial phase of the invasion of Normandy, Operation Overlord. Fewer people remember that June 1944 had another D-Day, when on the 15th, the United States conducted a massive amphibious landing on the Japanese-held Mariana Islands. Known as Operation Forager, this D-Day equaled Neptune in some respects and exceeded it in others.
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Most people recognize 6 June 1944 as D-Day, when Americans, British, and Canadians, with assistance from the forces of 17 other nations, assaulted northern France in Operation Neptune, the initial phase of the invasion of Normandy, Operation Overlord. Fewer people remember that June 1944 had another D-Day, when on the 15th, the United States conducted a massive amphibious landing on the Japanese-held Mariana Islands. Known as Operation Forager, this D-Day equaled Neptune in some respects and exceeded it in others.

A Tale of Two Invasions
In the two-ocean war, June ’44 was witness to two epic amphibious operations: Normandy in the Atlantic and Saipan in the Pacific.