WOW Quest:At The Enemy's Gates (13851)  

This is an easy quest when you get hold of it. The Argent crusade camp is located south of the Corp'rethar gate.

The commanders are just like fighting a NPC valiant or player at the Argent tournament grounds. Keep up Defend. Take down his shield with Shield break. Charge and thrust! Rinse and repeat. Tip: take the one with the weakest defence around him (3 red shields)

The gargoyle scouts are easy but annoying. Hit them 2 times with shield break and they die, but they have a fast spawn rate.

The Boneguard footmen: There is alot of them, they look scary, the spawn fast, and still they're not a problem. As the quests says: "Do not fear the masses of boneguard footmen, (name), for they can easily be trampled under your horse's hooves" You simple have to ride into them and you get the kills.

The catapults can be taken down from range with Shield break. They cant attack themselves and they wont aggro anything else when they get hit so just spam shield break.