Age of Wushu encourages that line of thinking, because you're going to need to stand together if you want to defend yourself from all of the other guilds thinking the exact same thing. The latest development blog on the game explains how guilds can control territories as well as how they can lose those lands if they fail to defend against their enemies.
Guild territories are attached to existing zones seamlessly without a loading screen, although you have to speak to an NPC to teleport there. Structures on controlled territories can be upgraded for various benefits, but those upgrades can be lost if a rival guild assaults the territory. Check out a video of guild warfare in action just past the break, and get ready for the game's official launch this Wednesday by getting ready to pick your enemies and burn all they own to the ground.