sappers

/S AE1 P ER0 Z/
noun
  1. 1

    One who saps; specifically, one who is employed in working at saps, building and repairing fortifications, and the like. Often known as a combat engineer or military engineer.

  2. 2

    An officer or private of the Royal Engineers.

Source: https://en.wiktionary.org/wiki/sapper, https://en.wiktionary.org/wiki/sappers