Ar Rutba is a city in the Iraqi Desert. It is the westernmost town of any real size. As of this writing, Ar Rutba is a hotbed of insurgent activity and is controlled by IS. Ar Rutba is a Sunni majority city and was most notably the site of a large part of the old Iraqi air defense warning system housing a number of military personnel there. The warning station was destroyed in the 1990-91 Gulf War.