Hell Is for Heroes (1962)
Clint Eastwood's go-to director Don Siegel made this classic well liked war film starring an over intense Steve McQueen, Bobby Darrin and James Coburn as part of a small unit of US soldiers who have to con a nearby German garrison into thinking they hold the whole area rather than just being a few men, until reinforcements arrive.
For a war film this is more character study than action packed spectacle. There are no German soldiers in it other than extras to shoot at so it never feels exciting or indeed tense in the threat department and whilst the various characters of the US company are interesting they certainly aren't The Dirty Dozen.
There's some good black and white photography going on but overall this always feels uninvolving and lacking in substance when compared to many other men on a mission / backs to the wall films.