Interesting lil' note here.
Actually fighting in a war makes up a small section of it,and is also the smallest amount time spent by any soldier during their enlistment.
Meanwhile,they've been going at with the enemy daily?,with Mimi being the immortal death dealing punching bag.
So the use of these child soldiers is almost as savage as ancient tribal warfare,they're being pushed harder then ever in order to outright slaughter the otherside,and even we haven't been given the largerest scope about why it even happens.
Hopefully we a get a full look at the truth behind it all by the time the story is done,and hopefully some long lasting peace for them war vets to settle their PTSD once and for all.