Such was the case for Captain Storm, Johnny Cloud, Gunner and Sarge....all features set during World War II who lost their own individual features, but were brought together (along with the crew of the Haunted Tank) in G.I. Combat #138 (October-November, 1969) by Robert Kanigher, Russ Heath and Joe Kubert, and then given their own spot in Our Fighting Forces, starting with #123 (January-February, 1970), by Robert Kanigher and Ken Barr.
But, let's take a quick look back to see where these Losers came from....
Gunner And Sarge
This was the last appearance of Gunner and Sarge before they were recruited to the Losers.
Storm was later found, having lost an eye (taking away his original premise, being close to the story of President John F. Kennedy's time on a PT Boat).
But, they battled on....
Outsiders to save Markovia. Their final mission, without all the time travel additions, was chronicled in the Losers Special #1 of 1985, where the Losers lost, and were never to be seen again....
truly secret origin of the Justice League of America, that had the JLA and JSA living on the same world (which Rebirth has put closer to the DC world of now, there seemed to be more to the Crisis...and they didn't lose quite the way the Losers Special showed).
....even during the U.S. Bicentennial, where various legends of World War II gathered to remember the late Sgt. Rock in DCU: Legacies #4 (October, 2010) including the Losers, who seemed to somehow have survived World War II and had lives afterward!