The Missouri Compromise of 1820: Map, Terms, and Historical Impact #2241990 (License: Personal Use)

The Missouri Compromise, brokered by Henry Clay in 1820, temporarily resolved sectional tensions by admitting Missouri as a slave state and Maine as a free state, maintaining congressional balance. It established the 36°30′ parallel as the dividing line for future slavery expansion in western territories, excluding the Louisiana Purchase lands north of that latitude-except Missouri itself. The compromise delayed but did not prevent the eventual Civil War, as later conflicts like the Kansas-Nebraska Act undermined its terms.

Used in educational history websites, classroom presentations, or museum exhibits to explain early 19th-century U.S. sectional politics; targets students, teachers, and history enthusiasts seeking visual context for antebellum compromises.