I followed all numbers in war from the start. After getting **** released after the resets we went from 125k units to 123k. The 123k was partly because of 9.6k new solds on reset provs, so the loss from bishop was around 11.6k roughly (125-123 + 9.6k solds) . Not all intel was updated and some loss would have been due to the few hits that occurred between bishop releasing and me tallying numbers. So an estimate of 10-14k released units sounds about right. The fact that it was mostly def that was released made it a lot worse for us, since we ended up with provinces with stupid high off to def ratio that just got chained later and so their off became kinda useless.
Both kingdoms started conflict with around 120k trained units, so having 11-12k be released was v. significant as it was 10% of our total military while also being down two attackers + their econ. Additionally we were left with the TB from the feeding which meant that 5-8 provs were already in tax, making them expensive to feed.
The main reason we still won the war was due to superior econ control as our 3 mystics managed to FB their entire kingdom and our tpa provinces kidnapped aswell. They had 5x mystics but it seems that they choose to maybe ToG alot (they funded a dragon) and do other spells instead of doing econ control. That combined with continuous riots on them lost them the econ war, and I could follow the amount of trained units gap between the two kingdoms drop continuously as UDs sustained and their units were dying, while we were outtraining them. So in many regards this war was won by alot of correct microing of resources (runes/mana/training). Prior to their WD we had more military units than them and our UDs had converted a sizeable amount of elites which made the advantage even bigger.