Causes Foreign relations -- 5 History -- 2 Iraq War, 2003 -- 2 Persian Gulf War, 1991 -- 2 Politics and government -- 2 Biography 1 more ... Biography -- 1 Case studies 1 Civil rights -- 1 Civil war, 1861-1865 1 Civil war, 1861-1865 -- 1 Cold War 1 Drug traffic -- 1 Iraq War, 2003-2011 -- 1 Islam and politics -- 1 Moral and ethical aspects -- 1 Political aspects -- 1 Political corruption -- 1 Politics and war -- 1 Propaganda 1 Reconstruction (U.S. history, 1865-1877) 1 September 11 Terrorist Attacks, 2001 -- 1 Slavery -- 1 Slaves -- 1 Soldiers -- 1 Terrorism -- 1 United States -- 1 Weapons of mass destruction -- 1 World War, 1939-1945 -- 1 less ...