Many of the colonies, however, soon came to a realization of the objections against this species of trade. New England, Pennsylvania, and even South Carolina were anxious to discourage it by imposing a heavy tax on slaves. Among the Southern leaders, Jefferson and Lee were opposed to the practice and persistently sought to put it under the ban of the law. But the British Parliament abrogated all measures aimed at legal interference with the traffic, and British merchants insisted upon its continuance.In 1761, for instance, it was proposed in the legislature of Virginia to suppress the importation of Africans by levying a prohibitory duty. The act was passed; but in Great Britain it met the fate of all similar bills, and was sent back with a veto. in council issued an instruction under his own hand on December 10, 1770, commanding the Governor of Virginia, “upon pain of the highest displeasure, to assent to no law by which the importation of slaves should be in any respect prohibited or obstructed.”
The History of North America, Volume 6
https://books.google.com/books?id=yGIsAAAAIAAJ&pg=PA18
With these vetos, Britain forced slavery on America.
“The British forced slavery on America”
Did the British force the colonists to buy slaves?