Missouri Compromise Map: U.S. Territorial Division on Slavery, 1820 #2241989 (License: Personal Use)

This 19th-century political map depicts the United States after the Missouri Compromise of 1820, highlighting the 36°30′ parallel as the dividing line between future free and slave territories. Areas like the Arkansas Territory and Missouri are labeled with their admission status, while Oregon Country reflects joint U.S.-British claims. The legend clarifies color coding for free states, slave states, and territories affected by the compromise.

Used in educational history resources, museum exhibits, and digital archives to illustrate antebellum U.S. sectional tensions; serves users researching early federal compromises on slavery, territorial expansion, or Civil War origins.