US History › Section F · Westward expansion and the cotton South › Topic F.9

Filibusters and the push for new slave states

Even after the Mexican Cession, many slaveholders wanted more land for slavery, and they looked south: to Cuba, Mexico and Central America. When diplomacy failed, private armies called filibusters tried to seize territory by force, and the attempts widened the gulf between North and South.

In this topic

  • Why the South looked south
  • What a filibuster was
  • Worked example: why Cuba?
  • Narciso López and the Cuban expeditions
  • The Ostend Manifesto
  • Worked example: reading the Ostend Manifesto
  • William Walker in Nicaragua
  • Walker's downfall
  • Other routes to expansion
  • Common mistakes to avoid
  • Key takeaways

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