Secret means of command and control are shown in this Army film. Shows aerial battles, combat in France, and wire laying. Officers train at Fort Monmouth. Shows a radio relay system, tubes, improved equipment, and mine detectors. Aerial radar is demonstrated. Parachute drop-markers with radio signals guide an airborne operation. Shows a message center and a coding machine. V-2 rockets are tracked over England by radar and shot down. Corpsmen photograph combat scenes. The Army filmaking system – shows a “foxhole movie.” Message interception methods are described. An officer returns from behind enemy lines on Mindanoa, MacArthur returns to the Philippine Islands.