What did the 14th and 15th amendments do, theoretically?

The Fourteenth Amendment also added the first mention of gender into the Constitution. It declared that all male citizens over twenty-one years old should be able to vote.

14th, and 15th Amendments, known collectively as the Civil War Amendments, were designed to ensure equality for recently emancipated slaves ... The 15th Amendment prohibited governments from denying U. S. citizens the right to vote based on race, color, or past servitude.