World War I
The United States denounced what country for the sinking of the Lusitania.
or
What is Black Tuesday?
M.A.I.N. -- Militarism, Alliances, Imperialism, Nationalism
What is Korematsu v. United States?
or
What is conscription?
or
Who is the KKK?
or
What is African American artists were just as talented as white artists?
or
What is the United States wanted to adopt a policy of isolation?