C rations existed during WWII and Korea. What you probably got, however, were K rations. When I was in Germany(1959-1962)we got some C rations that had green lucky strike packages in them. Green were the color of Lucky packs before WWII, right after the war started Lucky changed the color of the pack with the slogan, “Lucky Strike has gone to war too!” We were leery about eating the rations but they were perfectly fine.
Yep! You’re probably right... but Hey! Remembering nomenclature from 40 plus years ago is like anything else these days... my memory is but a memory! LOL!
Don’t know where you ate but We had C-2 Rations which were just repackaged or relabeled C (canned) Rations.
This was Nam 1968-71 and beyond.
We also had a lot of C-3’s and 4’s along with MCI’s and MRE’s laying around .. doing nothing but aging. 8)
Our troops in the Pacific ate the rations from WWI, unfortunately, they also had the weapons from WWI too.