Foreign relations -- Politics and government -- 12 National security -- 2 Causes 1 Congresses -- 1 Decision making 1 Diplomatic history 1 more ... Economic conditions -- 1 Economic integration 1 Europe -- 1 European Union 1 German reunification question (1949-1990) 1 History -- 1 Iraq War, 2003 -- 1 Iraq War, 2003- 1 Operation Allied Force, 1999 1 Peacekeeping forces. European 1 Social conditions -- 1 World War, 1939-1945 -- 1 less ...