American Army demonstrates some new weapons; antiaircraft guns and white phosphorus hand grenades.
Full title reads: "War's latest terrors. New monster coast defence guns hurl 1,000 lb. shell, 30 miles".
United States of America (USA).
L/S of vast tank-like machine, a man stands on top of it cranking a handle which moves an enormous gun on the front. We see the gun fire twice, from different angles.
Intertitle reads: "Multiple mounted antiaircraft machine guns".
Various M/S of groups of soldiers from American Army demonstrate use of guns: one man stands on a rotating plinth with four massive machine guns in a row in front of him. Other men stand next to the plinth loading more bullets in the guns.
Intertitle reads: "White phosphorus hand grenades make startling spectacle".
L/S of row of soldiers at one end of field. Simultaneously they all throw hand grenades. The grenades explode, creating a sheet of white smoke.