Numbering close to 236,000 active personnel, the Brazilian Army has the largest number of armored vehicles in South America, including armored transports and tanks. It is also unique in Latin America for its large, elite forces specializing in unconventional missions, the Brazilian Special Operations Command, and the versatile Strategic Rapid Action Force, made up of highly mobilized and prepared Special Operations Brigade, Infantry Brigade Parachutist, 1st Jungle Infantry Battalion (Airmobile) and 12th Brigade Light Infantry (Airmobile) able to act anywhere in the country, on short notice, to counter external aggression. The states' Military Police and the Military Firefighters Corps are described as an ancillary forces of the Army by the constitution, but are under the control of each state's governor.