Cataclysm brought with it a lot of changes -- the face of Azeroth was forever changed as the landscape altered when Deathwing burst forth onto the scene. But along with the physical changes, there were plenty of political changes as well. For the Horde, Cataclysm saw the rise of a new Warchief in Garrosh Hellscream, as Thrall took his place beside the Earthen Ring and tried to repair the tattered land. The Alliance saw the rise of the Council of Three Hammers in Ironforge, as Magni Bronzebeard's sudden demise left a hole in the heart of the Bronzebeard dwarves.
It was the shattering of the land that saw both Alliance and Horde forces immediately move to reconfigure their borders and take whatever land and resources they could possibly get. Though the war rages on, some places are no longer war-torn and filled with the sounds of combat. Instead, these once-populated areas are filled with the silence of lives lost, of the cautious footsteps of looters looking to take whatever spoils of war they can carry.
Perhaps the most saddening of these is the once-peaceful settlement of Camp Taurajo -- now a charred version of its former self, left to wither back into the harsh lands of the Southern Barrens.