Answer:
The sinking of the Lusitania by a German submarine was the event that pulled the US into World War I.
During the 1920s, many minority groups gained more prominence and independence than they had ever had in the past. Among African Americans, this led to a rediscovery of their African roots, as well as an artistic movement that attempted to create its own types of artistic expressions. Women were another group that benefitted, as many became more liberated, as well as more relevant in the public sphere.
Many people disliked such modern changes, particularly when it came to racial equality and social mobility. These people valued the ideas of race and class highly, and believed these to be the right way to organize the nation. Some of the ways in which these people attempted to regain control was by creating racist laws such as Jim Crow laws and segregation. They also formed groups such as the Ku Klux Klan in order to scare people into submission.
Native Americans played a huge role in different wars for the empire. For one, during the French and Indian War, Native Americans allied themselves with the French, in an effort to drive the British out of North America. This is all I can say without doing any research, but I hope it helped! :)
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