Many great movies listed above so far, so i'll try not to duplicate them with:
Decision Before Dawn w/ Richard Basehart, Gary Merrill, Oskar Werner, Hans-Christian Blech, O.E. Hasse, Til Kiwi, Wilfrid Seyffarth and a very young: Klaus Kinski, as the "whining soldier."
A Time To Love and a Time To Die w/ John Gavin, Lilo Pulver, "Dana" Jim Hutton, Keenan Wynn, Thayer David, Jock Mahoney and Don DeFore.
Stalingrad w/ Thomas Kretschmann.
Cross of Iron w/ James Coburn, James Mason, Klaus Lowitsch, Maximilian Schell and David Werner.
The Battle of Britain w/ Trevor Howard, Michael Caine and Curt Jurgens.
The Enemy Below w/ Robert Mitchum, Doug McClure and Curt Jurgens.
Fixed Bayonets w/ Richard Basehart, Gene Evans and Skip Homeier.
Hell To Eternity w/ Jeffrey Hunter, David Janssen, Vic Damone and George Takai.
Purple Heart w/ Dana Andrews.
Sahara w/ Humphrey Bogart, Dan Duryea, Kurt Krueger and Bruce Bennett.
Von Ryans Express w/ 'Ol Blue Eyes" Frank Sinatra, Trevor Howard, Brad Dexter and Sergio Fantoni.
Go For Broke w/ Van Johnson and John Banner.
Never So Few w/ Frank Sinatra, Charles Bronson and Steve McQueen.
Hell Is For Heroes w/ Steve McQueen, Fess Parker, Bob Newhart and James Coburn.
Beau Geste w/ Gary Cooper.
Objective Burma w/ Errol Flynn.
Charge of the Light Brigade w/ Errol Flynn, David Niven, Olivia DeHavilland and Donald Crisp.
Dawn Patrol w/ Errol Flynn, David Niven, Basil Rathbons and Donald Crisp.
Sink the Bismarck w/ Kenneth More.
Stalingrad: Dogs Do You Want To Live Forever w/ Curt Jurgens.
None But the Brave w/ Frank Sinatra, Clint Walker and Brad Dexter.
Too Late the Hero w/ Cliff Robertson, Michael Caine, Henry Fonda (briefly) and Stanley Andrews.
Battle of the Bulge w/ Henry Fonda, Ty Hardin, Telly Savalas, George Montgomery, Robert Shaw, Robert Ryan and Charles Bronson.
Hotel Berlin w/ Alan Hale Sr.
Hannible Brooks w/ Oliver Reed, James Donald, Wolfgang Priess, Hans Lohner, Til Kiwi and Michael J. Pollard.
Midway w/ Charlton Heston, Henry Fonda and Robert Wagner.
Desperate Journey w/ Errol Flynn, Alan Hale Sr. Ronald Reagan, Arthur Kennedy and Sig Ruman.
Target Zero w/ Richard Conte, Charles Bronson and Chuck Connors.
The Devils Brigade w/ William Holden, Claude Akins, Richard Jaeckel, Carrol O'Connor and Michael Rennie.
Merrill's Marauders w/ Jeff Chandler, Claude Akins, Ty Hardin and Andrew Duggan.
The Colditz Story w/ Sir John Mills, Eric Portman and Theodor Bikel.
Bataan w/ Robert Taylor, Desi Arnez, and George Murphy.
Guadalcanal Diary w/ Anthony Quinn.
Halls of Montezuma w/ Richard Widmark, Robert Wagner, Karl Malden, Neville Brand, Reginald Gardner and Skip Homeier.
55 Days At Peking w/ Charlton Heston, Stanley Andrews and John Ireland.
The Red Ball Express w/ Jeff Chandler, Charles Drake and Sidney Poitier.
Major Dundee w/ Charlton Heston, James Coburn, R.G.Armstrong, Dub Taylor, Richard Harris, Ben Johnson and L.Q. Jones.
To Hell and Back w/ Audie Murphy, Charles Drake, Marshall Thompson and David Janssen.
I'll stop for now ;-D