cheap and fast coastal trade to the slow and more expensive inland roads. In 1814, only 1 out of 14 American merchantmen risked leaving port as it was likely that any ship leaving port would be seized. As the Royal Navy base that supervised the blockade, Halifax profited greatly during the war. From there, British privateers seized and sold many French and American ships. More than a hundred prize vessels were anchored in St. George's Harbour awaiting condemnation by the Admiralty Court when a hurricane struck in 1815, sinking roughly sixty of the vessels. Freeing and recruiting slaves The British Royal Navy's blockades and raids allowed about 4,000 African Americans to escape slavery by fleeing American plantations aboard British ships. American slaves near to the British military rebelled against their masters and made their way to British encampments. The migrants who settled in Canada were known as the Black Refugees. The blockading British fleet in the Chesapeake Bay received increasing numbers of freed slaves during 1813. By British government order, they were considered free persons when they reached British hands. Alexander Cochrane's proclamation of 2 April 1814 invited Americans who wished to emigrate to join the British. Although it did not explicitly mention slaves, it was taken by all as addressed to them. About 2,400 escaped slaves and their families were transported by the Royal Navy to the Royal Naval Dockyard at Bermuda (where they were employed on works about the yard and organized as a militia to aid in the defence of the yard), Nova Scotia and New Brunswick during and after the war. Starting in May 1814, younger male volunteers were recruited into a new Corps of Colonial Marines. They fought for Britain throughout the Atlantic campaign, including the Battle of Bladensburg, the attacks on Washington, D.C., and the Battle of Baltimore, before withdrawing to Bermuda with the rest of the British forces. They were later settled in Trinidad after having rejected orders for transfer to the West India Regiments, forming the community of the Merikins (none of the freed slaves remained in Bermuda after the war). These escaped slaves represented the largest emancipation of African Americans prior to the American Civil War. Britain paid the United States for the financial loss of the slaves at the end of the war. Treaty of Ghent Factors leading to the peace negotiations By 1814, both Britain and the United States