DON'T PANIC CHAPS:

Four British soldiers told to set up an observation post on a seemingly deserted island in the Mediterranean, come across four German soldiers
holed up in a Monastery, they agree to a truce, sharing the Monastery together until either the British or German troops arrive.            

CAST: Dennis Price, George Cole, Nadja Regin, Harry Fowler.  DIR: George Pollock (1959)
 

INVASION QUARTET:

A hilarious comedy about four wounded British soldiers who decide to invade France on their own and blow up some long- ranging Nazi guns
that have been shelling the British coastline.                  

CAST: Spike Milligan, John Le Mesurier, Bill Travers, Eric Sykes.  DIR: Jay Lewis (1961)