Edwin Marian

In a Nazi concentration camp, an escapee awaiting execution is spared when the commandant, a former prize-fighter, discovers the prisoner has amateur boxing ability. Ordered to train, he gradually sharpens his skills. (imdb)

During the Spanish Civil War in 1936, a group of International Brigadiers are cut off, lacking ammunition and water. Five men, plus a radio operator, are chosen by their commander to remain with him and hold off the enemy, whilst the others retreat. After a brief skirmish, the five men are each given part of a message that will only be decipherable in the event that all five return safely.