Shubhanan Kulkarni
1

They were made at the time of the American Reconstruction after the end of the civil war. That is why they are also known as the "Reconstruction Amendments"


13th amendment: Abolished slavery

14th amendment: American citizenship will go to anyone who is born on American soil, regardless of race or ethnicity.

15th amendment: any American citizen (male), regardless of race, color, ethnicity, and etc has the right to vote.