Your forces were out on a routine patrol and the undead were suddenly everywhere! Your forces were badly depleted in the conflict thus you must continue to do your job and keep the undead population under control until a solution can be found.
As a U.S Marine fighting through each city under siege, kill the leader in each terrorist cell. U.S. Military's sophisticated technology, superior firepower, coordinated land and air strikes on the battlefield made your entry point easy and possible.
