The Sammarinese Armed Forces () refers to the national military defence forces of the Republic of San Marino. It is one of the smallest military forces in the world, with its different branches having varied functions including: performing ceremonial duties; patrolling borders; mounting guard at government buildings; and assisting police in major criminal cases. There is also a military Gendarmerie which is part of the military forces of the republic. The entire military corps of San Marino depends upon the co-operation of full-time forces and their retained (volunteer) colleagues, known as the , or Voluntary Military Force. National defence in the face of an aggressive world power is, by arrangement, the responsibility of Italy's armed forces. The component parts of the military (other than the purely historical Crossbow Corps) are distinguished (as in many nations) by distinctive cap badges, one each for the Fortress Guard (uniformed), Fortress Guard (artillery), Guard of the Council, Uniformed Militia, Military Ensemble (band), and Gendarmerie. There is no compulsory service, however under special circumstances citizens aged 16 to 55 may be drafted for the defence of the state. Military Branches The Crossbow Corps Although once at the heart of San Marino's army, the Crossbow Corps is now an entirely ceremonial force of about 70 volunteer soldiers. The Crossbow Corps has a continuous history from its first mention in the national statutes of 1295. Described by the Government as "The oldest military formation in the Republic, nominated in the statutes of 1295", its uniform is medieval in design, and although it is a statutory military unit, it has no actual military function today. By the mid twentieth century the Crossbow Corps had become largely defunct, save for parading on state holidays; but in 1956 the practice of training its members in crossbow shooting was revived, and a 'Crossbow Federation' was formed to encourage competition in this art, so that the unit (although still entirely ceremonial in nature) now again has a very active existence. The Guard of the Rock (or Fortress Guard Corps) Uniformed Unit The Guard of the Rock () is a front-line military unit in the San Marino armed forces. Its precise origin is difficult to pinpoint due to amalgamations. Its role was last redefined by statute in 1987, and it probably came into being as a military branch in 1754; however, the unit also uses the name "Fortress Guards" which may be traced