 Domestic defence is the responsibility of the all-volunteer military of Bulgaria, consisting of land forces, navy and air force. The land forces consist of two mechanised brigades and eight independent regiments and battalions; the air force operates 106 aircraft and air defence systems in six air bases, and the navy operates a variety of ships, helicopters and coastal defence measures. Following a series of reductions beginning in 1990, the number of active troops contracted from 152,000 in 1988 to about 32,000 in the 2000s, supplemented by a reserve force of 302,500 soldiers and officers and 34,000 paramilitary servicemen. The inventory is mostly of Soviet origin, such as MiG-29 fighters, SA-10 Grumble SAMs and SS-21 Scarab short-range ballistic missiles. By 2020 the government will spend $ 1.4 billion for the deployment of new fighter jets, communications systems and cyber warfare capabilities. Total military spending in 2009 cost $ 819 million.
