More than just "ONE" lesson...
I appreciate the intended message of this short. The notion of "one" is an important thought to pass along. EveryONE counts. Statistics dehumanize us. I respect the author/animator for working on delivering such awareness to the masses.
I have a few questions::
1. There wasn't JUST "one" casualty. Before the main soldier was shot on the plateau, another soldier in the background was shelled. Casualties of war include injuries as well as deaths, even if the background soldier (unrealistically) survived the direct shell impact.
Was this intentional? Was it intended that the soldier who was shelled is "ONE" who was forgotten or unaccounted for (MIA defines a casualty of war also)?
Based on the dialogue and imagery on TV in the cafe at the end scene - I presume (not assume) that this was unintentional...