Throughout history, the Army has played a major role in defending the country's sovereignty. Only several years after its inception in 1878, Bulgaria became a regional military power and was involved in several major wars – Serbo-Bulgarian War (1885), First Balkan War (1912–13), Second Balkan War (1913), First World War (1915–1918) and Second World War (1941–1945), during which the Army gained significant combat experience. During the Cold War the People's Republic of Bulgaria maintained one of the largest militaries in the Warsaw Pact, numbering an estimated 152,000 troops in 1988. Since the Fall of Communism, the political leadership has decided to pursue a pro-NATO policy, thus reducing military personnel and weaponry. Bulgaria joined the North Atlantic Treaty Organisation on 29 March 2004 and currently maintains a total 776 deployed troops in three countries.