The first iteration had a rules of war/ethics type system where as well as K/D ratios etc. it gave you a rank for how well you obeyed the rules of war. I remember I number of articles talking about how abysmally low all the scores were.
The game was such a realistic representation of the US army that players could just war crime to their hearts content with no repercussions.
For the same and only reason that there is regular spam, surely? For musubi.