Citations:retrenchment

In trench warfare

 * 1915, John French, "Battles in the West", in The New York Times Current History, The European War, Volume II
 * The salient being very exposed to shell fire from both flanks, as well as in front, it was deemed advisable not to attempt to retake the trench at night, and a retrenchment was therefore dug across it.
 * 1920, Patrick Richard Butler, A galloper at Ypres: and some subsequent adventures
 * My orders, which were in French, were to the effect that a certain portion of my trench—where the fourneau of the mine had been located—was to be evacuated forthwith, and a retrenchment dug in rear so as to block the evacuated portion.