Land Of The Dead (2005)

Within the walled city of Fiddler's Green, the last vestiges of the American population have formed a society separate from the hordes of zombies that roam the countryside. The leader of the enclave (Dennis Hopper) has a special recon unit led by Riley (Simon Baker) and Cholo (John Leguizamo) who take their men out in an armored vehicle called "Dead Reckoning" to search for supplies and special items for the elite of the city. Internal class and power struggles and a cadre of seemingly purposeful and intelligent zombies combine to make the continued existence of Fiddler's Green tenuous, and a showdown between the living and the dead inevitable.