| Keystone View Company A German Battery Position in the Meuse-Argonne Captured after a Bitter Struggle. n.d. Stereoview Private collection of Ralph Reiley LL/116325 (Ralph Reiley, 10 December 2021) The German 77mm light trench mortar. This is late war model on a wheeled carriage that acted like small direct fire infantry gun, than a mortar.
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