They will need to defend it for thirty minutes as the opposing faction tries to overtake the keep and lay claim to it.
In order to do this, the attacking faction will need to use Siege weapons like Catapults or Demolishers to your advantage. The attacking faction will use their Siege weapons to break through enemy lines and to destroy the walls surrounding Wintergrasp Keep while the defending faction can use Siege weapons to put a crimp in their plans.
At the start of the Wintergrasp battle, each faction is able to have a maximum of 8 Siege vehicles at their disposal. But you can increase this total to sixteen vehicles by taking control of the two Goblin Workshops located in the Southern parts of Wintergrasp.
If your character is going to create and drive one of the Siege weapons in Wintergrasp, your character needs to earn various ranks. They earn of a rank of Corporal which is given to you after you kill five players of the opposing faction. After you record another ten kills, your character will earn the rank of First Lieutenant. At this point you will be able to create and drive any of the Siege Weapons.
Part of an effective Wintergrasp strategy is to make sure to use your Siege weapons to their fullest potential.
If your faction is on the attack, you want to make sure you gain control of the factories near the Wintergrasp Keep. This will make sure you have a shorter distance to travel with the Siege weapons. Once you have control of them, you will now need to focus your attention on the outer wall. Siege Engines and Demolishers are the best for breaking through the defenses.
Do not forget about the players of the defending faction. They can do enough damage to your Siege weapons to destroy them, so have your foot soldiers focused on taking them out quickly.
When your side is defending the Wintergrasp Keep, the best strategy is to divide up your force into two units; those who will repel attackers with the cannons and the rest who will venture out to take control of the factories. If you are able to limit the number of Siege weapons your opposition has, it will be easier for you to defend the Keep.
No matter what side you are on, the moment the inner wall is breached, everyone's attention needs to be on the Relic. Whether you are defending or attacking, Area Effect Spells work wonders here.
Communication is key when it comes to winning the battle of Wintergrasp. If you have a few players giving out instructions while some are reporting in when there are trouble spots, your faction should have the upper hand in the battle.
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