Why did the United States at first resist intervening in World War I? Why did it later retreat from this policy and send troops?
How did World War I contribute to progressive-
After the war, what factors drove the conservative reaction in American politics, most vividly in the labor upheaval and Red scare that swept the nation? How did they shape the postwar political spectrum?
What drove African American and Mexican migration north? How did the war facilitate these changes? How was this migration significant?