Territorial Dealings Mod for Minecraft 1.9/1.7.10 adds the ability to start factions, claim chunks as part of your territory, recruit players and then have a go at other player’s territories to take them over. At its most basic it adds claim deeds and territory expansion orders to start factions and lay claim to chunks for your faction and have those be protected. (Others will not be able to build/mine in your territory.) Claimed territories contain basic building protection. That is, anyone not part of your faction cannot place or break blocks in it. Killing you, however, blowing things up remotely, rummaging through your chest or trampling your crops and such is not prevented.
Download link: Territorial Dealings Mod for Minecraft 1.9/1.7.10