Page "Trench warfare" Paragraph 3

Field works are as old as armies.

Roman legions, when in the presence of an enemy, entrenched camps nightly when on the move.

Similar measures, from Frederic the Great's camp at Bunzelwitz, to Arthur Wellesley's with his defense lines at Torres Vedras, to the French lines of Weissenburg, were frequently used .< ref > George Ripley, Charles Anderson Dana, The New American Cyclopaedia: A Popular Dictionary of General Knowledge, D. Appleton & Company, 1859, p. 622, ( a work in the public domain ) More than 80, 000 of the best shooters received the semi-automatic RSC 1917 rifle, allowing them to rapid fire at waves of attacking soldiers.

Firing ports were installed in the newly arrived FT 1917 tanks.