Eastvale

Westbrook Garrison is considered by some to be the last bastion of order heading away from Stormwind. The garrison is located in Forest's Edge on the western end of Elwynn Forest near the border with Westfall. It is apparently near the town of Westridge. Beyond the garrison lie the dry fields of Westfall, currently controlled by the agents of the Defias Brotherhood and their dreaded mechanical harvesters.

This garrison holds Elwynn’s western border and protects the region from gnoll attacks. The soldiers and mercenaries within are a loud and brawling bunch, eager for tales from the road; they enjoy a good mug of ale and a good fight.

South of the garrison the forest is full of gnolls, and beyond them, only a river separates Elwynn from shadowy Duskwood. The brave defenders of the garrison work night and day to protect the citizens of Elwynn from the dangers beyond the forest.

Taken from: http://www.wowwiki.com/Westbrook_Garrison

Historically, the area of Westbrook is Withamhall land. However, the family has not had influence over the land for over a century.