What year did slavery end in the united states?

Historians are concerned with the accuracy of their writings and readings but are also aware of the inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try really need on this, and you^^

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?

What did the japanese regard as the main purpose of the attack