Three

Three stories are set at the beginning, middle and the end of WW2. In all three of them the hero of the movie must witness the death of people he likes.

Three is a 1965 drama war movie directed by Aleksandar Petrovic, starring Branislav 'Ciga' Jerinic, Slobodan 'Cica' Perovic, Velimir 'Bata' Zivojinovic. It holds an IMDb rating of 7.7/10 from 1,169 votes and runs 1h 20m.