Answer:
The Australoid Adivasis are among the oldest Indians of them all, they arrived in India in 60,000 BC. But they were preceded by the Negrito ancestors of the Andamese, who were in Uttar Pradesh as early as 85,000 BC.
After the civil war, much of the ownership for land was unattainable for free slaves due to the government opposing the idea. Instead most African slaves had to become sharecroppers on plantations where they had previously been slaves.