Okay This is just a suggestion for all wars, Village v. Village
We will use Konoha vs. Sound for example.
Okay say Sound was to lose.
That is sound normally
And this is more or less a map idea that would take dedicated mappers.
After they lose the village should look at bit more destroyed and I am going to give you my shitty rendition of a destroyed Sound village after a lost war, and it should stay like this for maybe an hour or two.
Just fire on trees, buildings burned, blood everywhere, make it look like a war took place.