No, or the Vain Glory of Command

Episodes from entire military history of Portugal are told through flashbacks as a professorish soldier recounts them while marching through a Portuguese African colony in 1973. He easily draws his comrades into philosophical musings, and the little contingent suffers badly at the hands of the local military opposition.

No, or the Vain Glory of Command is a 1990 drama war movie directed by Manoel de Oliveira, starring Diogo Dória, Luís Miguel Cintra, Miguel Guilherme. It holds an IMDb rating of 7.2/10 from 1,079 votes and runs 1h 50m.