Americans hardly thought twice about dispossessing the Indians of land guaranteed them by treaty, but many worried about the outcome of repealing the Missouri Compromise and opening up the region to slavery.

READING THE MAP How many slave states and how many free states does the map show? Estimate the percentage of new territory likely to be settled by slaveholders.

CONNECTIONS Who would be more likely to support changes in government legislation to discontinue the Missouri Compromise — slaveholders or free-soil advocates? Why?