 The IISS reported in 1999 that the army's troop formations consisted of four to five armored brigades; nine mechanized infantry brigades; an airborne brigade; fourteen reserve brigades; and the Border Brigade.In addition, there is an air defense artillery regiment and a surface-to-air missile brigade.Each of the three territorial armies is believed to be assigned at least one armored brigade-usually attached to the army's headquarters-as well as a mechanized infantry brigade.