They prevented the loss of the skills of mobile warfare; they asserted the dominance of one side over no man’s land; and they might bring back valuable intelligence. This was a form of fighting which relied on stealth and surprise, which bypassed long-range fire, and instead required the weapons of an older generation, not only grenades and bombs but also picks and shovels. However, as raids, too, became institutionalised, so they grew in scale and elaboration, ‘a battle in miniature with all the preliminaries and accompaniments magnified’.

