The Bofors Gun. (1968)
Set in a Light Anti-Aircraft regiment in 1954, National Service BAOR. A weak Lbdr is Guard Commander on the gun park. Five of the six Gunners of the guard take advantage of his failings.
Very atmospheric, with an outstanding cast, Nicol Williamson, Ian Holm, David Warner, Peter Vaughan, John Thaw.
12 o' Clock High (1949)
The best WW2 film of them all. The writers, Beirne Lay Jr and Sy Bartlett had both served with the 8th Air Force in UK, and both had wide contacts. Bartlett was an ADC to Carl Spaatz, Commanding General of the 8th at one time; Lay led his group on several raids including the notorious Schweinfurt/Regensburg catastrophe, and evaded capture for three months after being shot down over France. He made it to American lines after D-Day.
Both men knew Colonel Frank Armstrong upon whom the character of Brigadier General Frank Savage (Gregory Peck) is clearly based. Other recognisable characters are "Major Joe Cobb", based on Paul Tibbets who eventually went on to pilot Enola Gay to Hiroshima, "General Pritchard" is clearly Major General Ira C Eaker, CG VIII Bomber Command, and "1/Lt Jesse Bishop" wins the MoH at the start of the film for the famous action of the real-life John C "Red" Morgan.
The fictional "918th Bombardment Group" is based at the fictional station of Archbury, but if you know what you are looking for it is clearly based on the real life "hard luck" 306th based at Thurleigh in the difficult days of late 1942/early 1943 when the 8th losses were at a critical level.
The events, though compressed and placed in a different chronological and geographical sequence, portray the task that Armstrong was sent to the 306th to sort out. In the film we see "General Pritchard" replacing "Col Frank Davenport" with "Brig Gen Frank Savage" as CO 918th BG. In reality Eaker relieved Col Charles Overacker and replaced him with Col Frank Armstrong.
The B-17F used in the film as "Savage's Ship" is named Piccadilly Lily. This is a movie confection - there was a real Piccadilly Lily, but she belonged to the 100th BG (the Bloody Hundredth) at Thorpe Abbots, and went down with her crew over Bremen in October 1943.
Piccadilly Lily II lives on, and is currently undergoing restoration in California.
Edit: It has just occurred to me that there are no female characters in either film.