Most, but not all of the infamous Al Anbar Province is located within this desert region. If entering from Jordan this will be the first Province you will enter. Al Anbar Province's terrain is similar to parts of the western United States of Wyoming and Utah, the climate in Al Anbar is also similar to any other high desert region in the world.
The majority ethnic group in Al Anbar Province is Sunni, although there is a mixed bag in the Ar Ramadi area which leads to lots of street battles in that city. Ar Ramadi is a modern day recreation of an old west, gunslinging cow town. There is almost constant shooting and explosions from rocket propelled genades, car bombs, road side bombs, etc.