Simply rush down one lane and your target will still have bonus defenses conferred by the other two lanes - in short, it'll be important to split your forces and think tactically. Thankfully, they have a weakness: each Keep on Alterac Pass grants that team's General armor.
If a team can't finish them off, Drek'Thar and Stormpike will also regenerate health while out of combat. Unlike a stationary Core, these Generals move around the field, clearing minions and attacking players head-on. Instead of destroying a Core (aka your home base), Alterac Pass has you fighting against supremely powerful NPC Generals: an orc named Drek'Thar fights for the Horde, while the dwarf Vanndar Stormpike defends the Alliance.