Flieger Schutz! ” (aircraft shelter) or German warnings of: “Keep to the sidewalks. This road is constantly bombed by British airmen.”

They were a new plague of war, and did for a time gain a complete mastery of the air. But later the Germans learned the lesson of low flying and night bombing, and in 1917 and 1918 came back in greater strength and made the nights horrible in camps behind the lines and in villages, where they killed many soldiers and more civilians.

The infantry did not believe much in our air supremacy at any time, not knowing what work was done beyond their range of vision, and seeing our machines crashed in No Man’s Land, and hearing the rattle of machine-guns from hostile aircraft above their own trenches.