Art,

I believe this is Jonas Bender's unit.

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"Surrounded by a veteran crew of Marines who have spent 15 months in the Southwest and Central Pacific, this gun, named the 'Lena Horne' by its crew, points majestically skyward. The gun is manned by members of [the 51st] Defense Battalion, one of two such Negro units in the Corps." 1945. Nicholson.