There were no losses anywhere (including during the assault on the human Castle), a "Tent", as well as any machinery, is clearly useless with such armies (a simple "Resurrection" did the trick) - and that's even though I didn't take ents or dancers into battle.
Losses occurred only in the penultimate final battle - it would have been possible to complete this fight cleanly too, but I was already too lazy to replay it.
Added after 5 minutes
Congratulations, Veteran ;).
Regarding the Knight - how so, without losses? There is a castle there; it will definitely cause losses, or did you take a tent?
By the way, I uploaded the replay of the human Castle assault above (attachment Tallis.sav) - everything is perfectly obvious there ;)