During the 1820s, sectionalism grew in the United States. What is sectionalism? when citizens develop increased feelings of pride and devotion to their nation when politicians become divided over interests of the regions they represent when the federal government places a group on a reservation to prevent conflict when a state breaks off from a nation and declares its independence Question 4 (Mandatory) (1 point) How did the Missouri Comnromise contribute to the eventual abolition of slavery?