Now it can be Told by Philip Gibbs — Read

The Canadians were not the only men to go out raiding. It became part of the routine of war, that quick killing in the night, for English and Scottish and Irish and Welsh troops, and some had luck with it, and some men liked it, and to others it was a horror which they had to do, and always it was a fluky, nervy job, when any accident might lead to tragedy.

I remember one such raid by the 12th West Yorks in January of '15, which was typical of many others, before raids developed into minor battles, with all the guns at work.