Which group committed violence against african americans in the late 1800s and early 1900s? tenant farmers white supremacists white republicans union troops

The group that committed violence against African American in the late 1800s and the early 1900s was white supremacists They are known by the KKK. Back in those days, they would lynch people by hanging. 

It developed as a reaction to the impact of european colonialism in africa on peoples of african descent. in the  mid-20th century, activists in africa adopted pan-africanism as a rallying cry for independence from colonial rule. some african pan-africanists sought to unite the continent as one independenthope it was useful