Missouri Compromise Map (1820) - Free vs. Slave States in Early America #2242000 (License: Personal Use)

The map depicts the United States following the Missouri Compromise of 1820, which admitted Missouri as a slave state and Maine as a free state to preserve congressional balance. It clearly marks the 36°30′ parallel-north of which slavery was prohibited in the Louisiana Purchase lands, except in Missouri-and labels key territories like Oregon Country and Arkansas Territory. Hatched patterns distinguish free territories, slave territories, and unorganized regions.

Used in educational history pages, museum exhibits, or digital archives covering antebellum U.S. politics; supports user intent to understand territorial expansion, slavery’s geographic limits, and legislative compromises before the Civil War.