Montage of scenes showing U.S. Marines undergoing training at the ordnance school (probably at Aberdeen Proving Grounds, Maryland). Film opens showing a large sign identifying the "Ordnance School, Marine Corps School." Camera backs away, revealing two orange-colored Terrier guided missiles rotating around on their launchers. Glimpse into a classroom where an instructor uses a pointer to discuss weapon features. Instructor and students outside standing with the two terrier missiles. Marines march in formation past a circular spot containing an artillery piece and a tall white column and a much smaller artistic representation of a Seahorse.Partly obscured by trees, writing on the column reads "...seas School." Navy and marine officers confering at a table. Trainees operating the maneuvering mechanism of twin Bofors 40mm gun. Closeup of the gun. Marines aboard ship undergoing arms inspection. Marines in England, watching British Highlanders on parade.