Pun Son and I trekked over to the icy wastes of Barrington to view 1917. After a good sleep, various bodily sphincters have finally unclenched. I understand there's an IMAX version; I probably wouldn't have survived that. Yes, it's intense.
IMDB raters have this as #41 on the list of best movies of all time. And (of course) it's been nominated for a Best Picture Oscar, and nine others.
Set in World War I's trenches, It's the story of two soldiers and their desperate mission to notify a remote regiment that their scheduled attack against a German force is doomed to failure. If they don't get through, 1600 of their countrymen will be slaughtered.
They proceed through different instantiations of hell. All impressively shot. I don't know about Best Picture, but the Oscar for Cinematography should be a lock. (And I say that without having watched the other nominees.)
Only one little quibble: would that have really been the best plan to save the regiment? Just send two random grunts to warn them in the nick of time? Especially since… well, I don't want to spoil anything.