It was the 13th Amendment
This is a hard question to answer There are 195 countries in the world today(according to the US). but according to the UN there are 241. For your question the answer is 195. Hope this helped!
The Fugitive Slave Acts required for the capture and return of runaway slaves within the territory of the United States, the escaped slaves were to be returned to their owners and often had harsh punishments.
Masses of former slaves were needed to work for landowners.
