The rebellion of Stormwind is a game where you train units and kill units from the opposite side, there is an income that will give you gold every 3 second, you can increase the amount of money you gain by getting kills, 5 kills = +5 gold income.
You can upgrade the damage and armor of your units in the training center, and research to be able to train Tanks.
If one side have not won within 24 minutes after the game start, Thrall will show up with his army and do a massive earthquake and destroy all your buildings, however, you will not lose by him destroying your buildings, but if all your units die you are a goner.