Missouri Compromise of 1820 Map - Free vs. Slave States and Territories #2242018 (License: Personal Use)

The map depicts the United States after the Missouri Compromise of 1820, with states and territories color-coded: green for free areas (closed to slavery), orange for slave-holding regions (open to slavery), and hatched areas indicating states formed under the compromise-Missouri (slave) and Maine (free). The 36°30′ N parallel is clearly marked as the dividing line for future expansion, excluding Missouri itself. It also shows territorial claims like Oregon Country (jointly occupied) and Spanish-held lands to the west.

Used in educational history pages, U.S. civics curricula, and museum exhibits to explain the political and geographic consequences of the Missouri Compromise; matches user intent seeking visual understanding of antebellum sectionalism and slavery’s expansion.