Missouri Compromise Map: Slave vs Free States in Pre-Civil War America #2241991 (License: Personal Use)

The map depicts the United States in the early-to-mid 19th century, highlighting slave states in orange (primarily in the South) and free states in cyan (mostly in the North and Northwest Territory). A prominent red line marks the 36°30′ parallel-the Missouri Compromise line-prohibiting slavery north of it in the Louisiana Purchase lands, except for Missouri itself. Key territories like Missouri Territory and Oregon Country are labeled, reflecting contested expansion zones.

Used in educational resources, history websites, and digital textbooks to explain antebellum U.S. politics, the Missouri Compromise, and the roots of sectional conflict leading to the Civil War; matches user intent for learning about historical geography and slavery’s legal boundaries.