1. What was the United States main
purpose for treaties with the Native
Americans?

From 1774 until about 1832, treaties between individual sovereign American Indian nations and the U.S. were negotiated to establish borders and prescribe conditions of behavior between the parties

one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.

b or c im pretty sure