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War With Mexico

War with Mexico adds significant western territory to the United States and opens a new arena in the fight to check the spread of slavery.

Missouri Engages in Interstate Slave Trade

Missouri removes restraints on interstate slave trade.

Texas Creates Slave Patrol

Texas creates a system for patrolling slaves.

Democratic Representative Tries to Ban Slavery

The Wilmot Proviso, introduced by Democratic representative David Wilmot of Pennsylvania, attempts to ban slavery in territory gained in the Mexican War. The proviso is blocked by Southerners, but continues to inflame the debate over slavery.

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