Final answer:
The 1870 amendment to the U.S. Constitution, the 15th Amendment, prohibited the denial of voting rights based on race, color, or previous condition of servitude. It aimed to extend voting rights to freedmen and ensure equal access to the ballot box. However, various restrictions were still implemented to limit Black political participation.
Step-by-step explanation:
The 1870 amendment to the U.S. Constitution, known as the 15th Amendment, prohibited the denial of voting rights based on race, color, or previous condition of servitude. This amendment aimed to extend voting rights to freedmen and ensure equal access to the ballot box.
However, states found ways to limit Black political participation through various means such as literacy tests, poll taxes, and White-only primaries.