Not sure if it was a movie or tv show but This guy gets sent back in time is propelled into the Vietnam war and I Believe that his friends rescue him eventually and when he gets back he goes to a Veteran Place and finds a picture that he is in. He also becomes special friends with someone in his platoon. For some reason I can remember what tv show or movie that plot is from
This sounds familiar…I wonder if it was an episode from the tv show Forever. I checked Wikipedia hoping an episode synopsis might give a clue, sadly it didn’t.
Running Against Time (1990)?
https://www.imdb.com/title/tt0100529/
https://en.m.wikipedia.org/wiki/The_Umbrella_Academy_(TV_series)
I’m pretty sure this is The Umbrella Academy, Episode #6 has Klaus time jumping back to the Vietnam War, he falls in love with a platoon mate, and when he comes back he and Diego end up at a Veterans bar where there is a photo of Klaus with his platoon on the wall.