A. Because if you only hear from one side of a war then you only get their side of the story, and there are always two sides to a story
Many Native American tribes allied with the British during the Revolutionary War. However, the Treaty of Paris, which ended the war, was silent on the fates of these British allies. The new United States government was thus free to acquire Native American lands by treaty or force. Resistance from the tribes stopped the encroachment of settlers, at least for a while.