No, or the Vain Glory of Command, "depicts a series of defeats from the entire military history of Portugal" [...] "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 (1961–74)"
Been meaning to watch this for years. The scenes involving the storyteller are all great, with solid commentary on nationalism, patriotism, and legacy, but I was a little disappointed when some (most) of the flashbacks scenes were pretty weak. The Battle of the Three Kings (Battle of Alcácer Quibir) involving Sebastian I is fantastic, however, and is really what makes the movie. The end is quite brutal, too.