World War One. France.
Various shots of French soldiers using mechanical digger to dig a trench.
Presentation of weird and 'useful' inventions of the British Army.
Trenches are dug and large pipes lowered - a dog helps with the work.
General Post Office workers show off new equipment to help them in their job. Bletchley.
Montage of footage from 1938 Crisis - digging trenches in Green Park and gas mask fittings.
Fascinating film about the building of new motorways in Germany in the 1930s.
Footage of mechanical trench digger in action.
The development of the Sapper for war purposes from 1900 to W.W.11.