The series began as Our Army At War and although in time the title began to display the tag-line featuring Sgt. Rock, it wasn't until the series had lasted 301 issues that it was re-named to Sgt. Rock.
CollectionsDC Goes To War (#67, 83, 233 & 235)Showcase Presents: Sgt. Rock vol. 1 (#81-117)Showcase Presents: Sgt. Rock vol. 2 (#118-148)Showcase Presents: Sgt. Rock vol. 3 (#149-163, 165-172 and 174-180)Showcase Presents: Sgt. Rock vol. 4 (#181-216)Sgt. Rock Archives #1 - Volume 1 (#81-96)Sgt. Rock Archives #2 - Volume 2 (#97-110)Sgt. Rock Archives #3 - Volume 3 (#111-125)Sgt. Rock Archives #4 - Volume 4 (#126-139)The Enemy Ace Archives volume 1 (#151, 153 & 155)
— Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/our-army-at-war/4050-1472/).