What does the 19th23rdand 26th amendments have in common?

Answer 1

The 19th gave women the right to vote, the 23rd gave people in the district of Colombia the right to vote, and the 26th made the legal voting age be 18.

Simply they all relate to voting rights in the U.S.

Answer 2

They're all related to resolving the issues involved with the American Civil War; for this reason, they are often called the "Civil War Amendments".

• The 13th abolished slavery, which was the primary cause of the war.
• The 14th decided who is considered a US citizen (including the slaves who were freed by the 13th), and that all citizens have the same rights under the Constitution. It also resolved other more minor issues, like getting rid of the Three-Fifths Compromise and dealing with leftover Confederate issues.
• The 15th granted all citizens the right to vote, regardless of their race or if they had been slaves. This allowed all black men to vote- even the ones who had been slaves until the 13th freed them. I say men because women were generally not allowed to vote until the 19th Amendment was passed in 1920.