I saw this as a feature length VHS hired from the local video store in the mid-to-late 1980s, in English.
I'm not sure of the plot, but it was animated.
The general points I remember are quite vivid:
a WW2 battleship outfitted for space
a scene right at the end where two characters are laying down on a shoreline with waves lapping at their feet - one of them dies, and the focus is briefly solely on the other character, but immediately reveals that in place of the first character there is now a baby
a scene where a character is trying to be convinced to go on a mission, and is introduced to some weapons training which consists of a shooting range, but the targets are living humanoid creatures, including children, which are pushed into the shooting range