In 1966, I was eating C-Rations......in 1967, in Alaska, I was eating K-Rations which had to be either WWII or Korean War vintage......at some point we were advised to toss the K-rats with pork as the cans were bulging.
I'm currently eating elk from September 2022.......both burger and large pieces of top and bottom round.......still perfect after 2 years and 2 months in the chest freezer. Zero freezer burn. Thank you Del Fox Meats.