Here’s a scan from “The Wall”, a 4 page GALLERY OF WAR written by Bob Kanigher and illustrated by me while still a student at Kubert School. In the story, “the wall” is a wall of casualties built up between British and German machine gun emplacements in Soisson, France, 1914.
While the Comics Code was in full force in those days, I was able to show the bloody pile of corpses by not showing them; just creating a mass of black with a hint of texture upon which the tiny figures of soldiers were seen slipping and sliding. Making the texture a full red added to it, I think. From SGT. ROCK #321, October 1978 (© DC Comics).