Full title reads: "Edgewood, Maryland".
United States of America (USA).
A plane flies high across the sky.
Shot of tail of plane as it puts out a smoke trail.
Various foggy shots. It look like troops on manoeuvres under heavy smoke screen. Various explosions and planes overhead add to the effect.
N.B. Item found in Unidentified Gazettes reel. Presumably from 1930s Gazettes.