While most of the artillery that supported men in the field was fired from a distance, some types of mortars were hauled into the jungle by troops on foot. A common one was the 60 mm M19 mortar derived from the British Stokes mortar of World War I. Americans got an extra punch from another mortar, the 81 mm M29, illustrated above by a crew from the 3rd Battalion, 4th Marine Regiment, 3rd Marine Division, near the Demilitarized Zone in October 1966. (AP Photo)