The slave trade was a practice whcih played a major rolein the colonial economy. It started when the African slaves were brought to the caribbean mainly to work in plantations, or in places were labor was needed, due to diseases and the mortality rate. At the beginning, the colonies did not really required large numbers of slaves.
The first colony receiving slaves was Virginia, which in 1619 received the first ones. This cipher grew up exponentially during thefollowing years,and it is estimated that by 1770,the numberof slaves was over 185.000 in Virginia alone, which makes it the Colony with the highest number.
Slavery for sure. I believe the second one is economic differences between the North and the South.
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19 militants associated with the Islamic extremist group al Qaeda hijacked four airplanes and carried out attacks against targets in the United States. Two of the planes were flown into the twin towers of the World Trade Center in New York City, a third plane hit the Pentagon just outside Washington, D.C
