No, or the Vain Glory of Command

No, or the Vain Glory of Command Portuguese Non, ou a V Gloria de Mandar is a 1990 Portuguese film directed by Manoel de Oliveira. The film, starring Lus Miguel Cintra and Miguel Guilherme, depicts a series of defeats from the entire military history of Portugal the assassination of Viriathus, the Battle of Toro, the failed attempt of Iberian Union under Afonso of Portugal and Isabella of Spain and the Battle of Alccer Quibir and the Lusiads episode of the Island of love, which are told through flashbacks as a professorish Portuguese soldier recounts them while marching through a Portuguese African overseas territory in 1973, during the Portuguese Colonial War 196174. He easily draws his comrades into philosophical musings, while the little contingent suffers surprise attacks by groups of independentist guerrillas.

Source: Wikipedia