Missouri Compromise Map: Free vs. Slave States in 1820 U.S. Expansion #2241980 (License: Personal Use)

The map highlights the geopolitical resolution of the Missouri Compromise, where Missouri entered as a slave state and Maine as a free state to preserve Senate balance. It color-codes regions: green for free states/territories, orange for slave states/territories, and hatched for newly formed states under the compromise, with the critical 36°30′N line demarcating future slavery limits. The unorganized territory (including present-day Great Plains) is shown in light green, while Oregon Country remains jointly occupied.

Used in educational history pages, U.S. civics curricula, and museum exhibits explaining antebellum sectional tensions; matches user intent to understand territorial expansion, slavery’s geographic limits, and pre-Civil War political compromises.