Politics and government -- 10 History -- 7 Nationalism -- 6 Ethnic relations 5 National security -- 5 Peace 4 Yugoslav War, 1991 -- 4 more ... Foreign relations -- 3 Boundaries 2 Congresses 2 Congresses -- 2 Ethnic relations -- 2 Geopolitics -- 2 History 2 Islam -- 2 Islamic influences 2 Muslims -- 2 Participation, Foreign 2 Balkan crisis 1 Causes 1 Civil War, 1998-1999 1 Civilization -- 1 Conflict management -- 1 Economic conditions 1 Ethnic conflict -- 1 Geography 1 Humanitarian intervention 1 Humanitarian intervention -- 1 International police 1 Intervention (International Law) 1 less ...