Success of suppressing the slave trade- Between 1810-60, the Navy freed around 150,000 slaves who were moved to the port in Freetown which later became the capital of Sierra Leone. This only represented 10% of the slaves transported to the Americas in this time however. When slavery was made illegally in America, then the slave trade was fully abolished in 1865. The reduction in demand dor slaves was more crucial in ending the trade than efforts to stop the trade at sea.