History of the United States I / Unit 15 USH1 2101 short lesson, about 20 seconds
The Long Causes
Captions available
The idea
The anchor summarises the war's causes as three: the westward expansion of slavery, abolitionism, and the rise of parties organised against slavery's spread.
In practice
Expansion running from Missouri in eighteen nineteen through Bleeding Kansas.
Where people slip
The party line runs Liberty in eighteen forty, Free-Soil in eighteen forty-eight, Republican in eighteen fifty-four. Units 13 and 14 cover all three.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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