if you are referring to blizz like scripting.
the battle mostly is fought in the middle

goal is ofcourse to kill the chiefs in the opposite camps, this can be achieved by taking over graveyards on enemy locations so the new spawn points are getting closer and closer to the enemy camp.
in the meantime you can choose to also deliver the scrap metal, orbs and medals for various rewards.
on ally side its a group of druids , large tree ent if i remember correct and also a wyrm blasting fireballs from the sky.
there are also quest items to be gathered from random mobs around the area for extra rewards.
for ally side it was hides.
also (my keyboard stopped working during writing:P )
the more camps/buildings of the enemy are wrecked the weaker the boss gets.
it was possible to zerg the end boss in enemy camp with a well coordinated group , we did that often with our raid team, just zerg it and attach that with raid quality members and tactics and it was over in 10 minutes and sometimes a battle would last a few days.