American Civil War Timeline
| 1775 | Philadelphia Quakers organize America's first antislavery society. |
| 1776–83 | English colonies' War for Independence against Great Britain ends with the formation of the United States. |
| 1788 | The U.S. Constitution is ratified, providing legal protection to slaveowners. |
| 1793 | Eli Whitney invents the cotton gin, which will dramatically increase Southern cotton production. |
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