To maintain the normal semblance of trench-warfare was an easy task for the German, and one that he never failed in.
This process of relief and the general conditions brought a return of trench-warfare almost on its old lines.
After trench-warfare days there was an incongruity in some episodes, which was not devoid of humour.
It was the beginning of trench-warfare, though owing to the nature of the country there were few trenches.
Another extensive project in the trench-warfare program was the manufacture of the so-called toxic gas sets.