A U.S. intelligence note on use of Japanese mortar ammunition in U.S. mortars during WWII, from Tactical and Technical Trends, No. 40, December 16, 1943. [DISCLAIMER: The following text is taken from the U.S. War Department publication Tactical and Technical Trends. As with all wartime intelligence information, data may be incomplete or inaccurate. No attempt has been made to update or correct the text. Any views or opinions expressed do not necessarily represent those of the website.]

JAPANESE 81-MM MORTAR AMMUNITION Test firing has demonstrated that Japanese 81-mm mortar ammunition is completely interchangeable with US ammunition when fired in the US 81-mm M1 mortar. Slightly shorter ranges are obtained with the Japanese ammunition.

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