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Custer is defeated by the Lakota Indians. -
Rutherford Hayes is elected the 19th President of the United States. -
The 20th president is assassinated and replaced by Chester Arthur. -
The territory of Dakota is divided and becomes two separate states. -
The territory of Idaho is admitted to the Union as the 43rd state. -
William McKinley becomes the 25th president of the United States. -
America and Spain enter into war over tensions in Cuba. -
The territory of Hawaii is formed. It is not yet a state.