Ordnance provision system. [Ordnance catalog (ordnance provision system): Group G, Half-track vehicles, car, half-track, M2, carrier, personnel, half-track, M3, carrier, 81-mm mortar, half-track, M4, carriage, motor, 75-mm gun, M3, sec. 3, Front axle group; Feb. 16, 1942.

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