Answer:
Slavery in the United States of America started in British North
America during the early colonial days of European settlement
on the continent. By 1800, a few northern states had abolished
(gotten rid of) slavery. Abolitionism continued to spread
throughout the North in the decades that followed. At the same
time, southern states saw a rapid expansion of the cotton
industry by using slaves as unpaid labor on cotton plantations.
By 1860, there were 15 slave states in the South. Four hundred
thousand families in these states had slaves in their households.
Southern states were threatening to leave the United States in
order to protect their growing cotton industry and retain the
ability to have slaves.
Explanation: