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" Early on the first morning at the rifle range, we began what was probably the most thorough and the most effective rifle marksmanship training given to any troops of any nation during World War II. We were divided into two-man teams the first week for dry firing, or “snapping-in.” We concentrated on proper sight setting, trigger squeeze, calling of shots, use of the leather sling as a shooting aid, and other fundamentals. It soon became obvious why we all received thick pads to be sewn onto the elbows and right shoulders of our dungaree jackets: during this snapping-in, each man and his buddy practiced together, one in the proper position (standing, kneeling, sitting, "
― Eugene B. Sledge , With the Old Breed: At Peleliu and Okinawa