Amphibious Brigades (Imperial Japanese Army)

The IJA Amphibious Brigades (海上機動旅団, Kaijō kidō ryōdan) were marines brigades of the Imperial Japanese Army during World War II. They were established in 1943. Although the Japanese invasion of Southeast Asia had been completed at the time of their founding, the Imperial General Headquarters (Daihon'ei) saw the need for flexible countermeasures to defend strategic islands in the Pacific Ocean from impending Allied invasion as the war situation deteriorated for the Japanese Empire.

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