Final answer:
The Civil War led to the 13th, 14th, and 15th amendments which abolished slavery, granted citizenship to all individuals, and protected the right to vote.
Step-by-step explanation:
The event in American history that led to the 13th, 14th, and 15th amendments was the Civil War.
The 13th Amendment was passed in 1865 and abolished slavery in the United States. The 14th Amendment, ratified in 1868, granted citizenship and equal protection under the law to all individuals born or naturalized in the U.S. The 15th Amendment, ratified in 1870, protected the right to vote regardless of race, color, or previous condition of servitude.
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