Unquestionably great movie...Top 5 'War Movie', though? I dunnow. It kind of goes heavy on spy-genre stuff for a lot of the runtime before becoming an action-fest, and is kind of the height of 'killin' naw-sees' 70s awesome where themes and messages takes a backseat to bursting blood-packets and explosions (at least after it spends the first half doing Cold War spy-shenanigans that just happen to be set in dubya-dubya-deuce)...and that all seems like it sets it apart enough to be one-upped or more by another film that's a bit more...'War Movie-y'? Developed? Iunnow.
Like, this is no knock against Where Eagles Dare because it's awesome fun and great moviemaking...but seems like better alternates exist for explicitly the best 'War Movies' as a genre.
Ehhhhhh, I dunnow about even putting this in the top five. Platoon is good. Powerful movie that's done well, etcetera... but suffers from being even more...pretentious(?) might be the word?...than Apocalypse Now while it kind'a does a lot of the same 'things' in terms of its direction. Which is a really high bar to cross because Apocalypse Now is very pretentious(?) and high-handed in everything it's doing.
Bridge Too Far being at or second-to the top seems appropriate. And I have heard good things about The Duelists from a couple places, but have yet to see it, so that'd be one I'd be interested in checking-out.
I'd contend Bridge Over the River Kwai is one that should be in these top fives somewhere (perhaps it gets mentioned as an also-ran or honorary or something, admittedly didn't listen to the YT element yet). Could take the spot of Where Eagles Dare and I wouldn't object.
This also surprised me for its absence in either person's top fives. It and Black Hawk Down always occupy the same mental place for war movies in my brain and I'd always put them near or next to each other on any list like this because even though, like
Apocalypse Now and
Platoon, they kind'a sort'a do similar things in terms of their direction and messaging--the way they go for realistic portrayals, big-but-still-historic action scenes,
and notable moments of reflection/consideration on the 'why' question...they both do all of it really well.