Mexican American War 1846-1848Britannica Level 2Britannica Level 3Gale |
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Indian Removal ActBritannica Level 3Gale ShortGale Long |
Missouri CompromiseBritannica Level 2Brittanica Level 3Gale |
Kansas-Nebraska ActBritannica Level 2Britannica Level 3Gale |
Underground RailroadBritannica Level 2Britannica Level 3Gale |