Polish war cinema is really great and this 1978 film shows a heroic page of Polish Defence against Nazy troops in Warsaw in 1943. The main heroes are young students who are inside the partisan militia group called Szare Szeregi, or Gray Ranks. They undertook several sabotage actions as well as military offensives killing some Nazi officers and providing actions of active opposition. The film is a classical Polish Soviet times effort with excellent casting, good tempo and very realistic battle scenes. What it lacks is a certain input of cash to make this albeit decent flick even more powerful and pushy. Certain passive approach makes the movie a bit slow by the mid-time and only the last part saves it from drag. Recommended still