For the lore on Elwynn Forest, check out WoWWiki.com, sweetums.
The forest is a gathering point for Alliance travelers from around the globe. The area of Westridge/Westbrook was once under the jurisdiction of House Withamhall and the Eastern Forest is under the jurisdiction of House Goldmane. The garrison of Westbrook briefly served as a meeting place for the Stormwind Assembly, the Alliance Council and the Alliance Civil Defense Council. It is likely that in the future it will be used again by similar institutions.