Enfilade (French)

means literally to spïn out; to put thread in [a needle], as enfiler une aiguille; to string beads by putting them on a thread, as enfiler des perles. Soldiers being compared to thread, we get the following metaphors: to go through a place as thread through a needle—to string artillery by placing it in a line and directing it against an enemy; hence, to scour or rake with shot.