What is the name for Smith's tactic?

What was the u. s. government's office of indian affairs responsible for doing?

How was slavery in mesoamerica, africa, and the arab world similar? many enslaved people were forced to pledge loyalty to their owners. many enslaved people worked in exchange for protection from foreigners. many enslaved people were captured during war. many enslaved people taught and tutored children.

Which is not an abundant natural resource found in africa?