Political violence -- History -- 4 History 3 Case studies 2 Congresses -- 2 Ethnic conflict -- 2 Islam 2 more ... Religious aspects -- 2 Terrorism -- 2 Violence -- 2 1998 1 Bloody Sunday, Derry, Northern Ireland, 1972 1 Civil War -- 1 Communalism -- 1 Conflict management 1 Congresses 1 Demonstrations -- 1 Derry (Northern Ireland) -- 1 Disaster relief 1 Disasters -- 1 Economic aspects 1 Economic assistance, American -- 1 Ethnic relations 1 Foreign relations -- 1 Guerrilla warfare -- 1 History, Military 1 Humanitarian assistance 1 Insurgency 1 International relations 1 Islam and politics 1 less ...