platoons of the line motorized companies; two in each company in the IMBS and six in the KAAB. The two brigades each had a headquarters company, four-line motorized battalions, a field artillery battalion, a support battalion, and air defense, signals, and engineers companies. Regions Central Riyadh Regional Headquarters controlled: Imam Muhammad bin Saud Mechanized Brigade (IMBS), which controls four battalions (1st–4th) as well as the 1st SANG Artillery Battalion, and is based in Riyadh Prince Saad Abdulrahman Mechanized Brigade (PSAR), which controls four combined-armed battalions, and is based in Riyadh Turki Mechanized Brigade was reported to be in formation in 2002. As of 2006, it remains uncertain as to how developed this unit is. King Khalid Light Infantry Brigade's strength is unknown Ceremonial Cavalry Squadron King Khalid Military College Military Police battalion 1st Special Security Brigade based in Riyadh 1st Rapid Deployment Special Brigade Irregular (Fowj) tribal regiments Eastern Eastern Regional Headquarters, which is located in Dammam, controlled: King Abdulaziz Mechanized Brigade (KAAB), was in information in 2002, but its strength and organization is still unknown. Stanton, writing in 1996, identified this brigade as the King Abdul Aziz Brigade, stationed in Hofuf south of Dammam. It comprised the 5th, 6th, 7th, and 8th Combined Arms Battalions and the 2nd Artillery Battalion (155mm M-198 towed howitzers). Prince Mohammad bin Abdulrahman al-Saud Light Infantry Brigade Military Police battalion 3rd Special Security Brigade based in Dammam 3rd Rapid Deployment Special Brigade Irregular (Fowj) tribal regiments Western Western Regional Headquarters, which is located in Jeddah, controlled: King Saud Light Infantry Brigade (KSB) based in Jeddah King Faisal Light Infantry Brigade (KFB) based in Medina Khalifa Omar bin Khattab Light Infantry Brigade (KOKB) based in Taif Military Police battalion 2nd Special Security Brigade based in Jeddah 2nd Rapid Deployment Special Brigade Irregular (Fowj) tribal regiments Other units National Guard Aviation Dirab Air Base - Center of Excellence and Aviation Training Brigade Khasm Alan Air Base - 1st Aviation Brigade Al Hofuf Air Base - 2nd Aviation Brigade Prince Abdullah Air Base - 3rd Aviation Brigade Independent battalions In addition to the battalions under the control of the three regional headquarters, SANG has four independent light infantry battalions, which appear to be dedicated to protecting facilities and installations Tribal militia The second component of the national guard is the Fowj (Arabic:فَيْج (also fayj) "legman, courier; company"), made up of Bedouin tribal (militia) battalions under the command