Punitive Expedition into Mexico Pictorial Collection"The collection consists of photographs and photomechanical postcards related to the punitive expedition led by General Pershing into Mexico in 1916. Formats include snapshots printed on postcard paper, and commercial "real photo" and photomechanical postcards. Depicted are: photographs of Gen. Pershing and Gen. Villa, images of the Thirteenth Cavalry, soldiers and officers, army camp and field life, military parades, mess halls, maneuvers, artillery, transport, firing squads, mass burials."