Eli Whitney patents the cotton gin, making cotton production more profitable. The market value of slaves increases as a result.
The First Fugitive Slave Law is passed, allowing slave owners to cross state lines in the pursuit of fugitives and making it a penal offense to abet runaway slaves.
Congress prohibits slave trade between the U.S. and foreign countries.
During a period of religious revivalism, known as the "Second Great Awakening," slaves convert to Christianity in large numbers for the first time.
Georgia prohibits international slave trade.
Virginia banishes white mothers of mulattos with their children.
A slave named Gabriel Prosser, believing himself called by God, organizes a plot to kill all whites in Virginia, sparing only Quakers, Methodists, and French. The conspirators meet under the pretense of holding religious meetings.
South Carolina forbids blacks from holding religious meetings at night.
Congress prohibits U.S. citizens from exporting slaves.
Congress extends the Virginia and Maryland slavery laws into the District of Columbia, establishing a federally authorized slave code.