Civil rights -- 2 United States -- Causes 1 Civil war, 1861-1865 1 Civil war, 1861-1865 -- 1 Government policy -- 1 History -- 1 more ... National security -- 1 Politics and government -- 1 Prevention -- 1 Reconstruction (U.S. history, 1865-1877) 1 Slavery -- 1 Slaves -- 1 Terrorism -- 1 War on terrorism, 2001- 1 less ...