The Webster–Ashburton Treaty, signed August 9, 1842, was a treaty that resolved several border issues between the United States and the British North American colonies. Signed under John Tyler's presidency, it resolved the so-called Aroostook War. The provisions of the treaty included:
The first USS Yorktown was a 16-gun sloop-of-war of the United States Navy. Used mostly for patrolling in the Pacific and anti-slave trade duties in African waters, the vessel was wrecked off Maio, Cape Verde in 1850.
The Blockade of Africa began in 1808 after the United Kingdom outlawed the Atlantic slave trade, making it illegal for British ships to transport slaves. The Royal Navy immediately established a presence off Africa to enforce the ban, called the West Africa Squadron. Although the ban initially applied only to British ships, Britain negotiated treaties with other countries to give the Royal Navy the right to intercept and search their ships for slaves.
USS Saratoga, a sloop-of-war, was the third ship of the United States Navy to be named for the Battle of Saratoga of the American Revolutionary War. Her keel was laid down in the summer of 1841 by the Portsmouth Navy Yard. She was launched on 26 July 1842 and commissioned on 4 January 1843 with Commander Josiah Tattnall III in command.
The first USS Shark was a schooner in the United States Navy. Built in the Washington Navy Yard to the designs of Henry Steers, Shark was launched on 17 May 1821. On 11 May 1821, Matthew C. Perry was ordered to take command of Shark, and the ship was ready to receive her crew on 2 June 1821.
William Compton Bolton, born William Bolton Finch in England, was an officer in the United States Navy during the mid-19th century.
The West Africa Squadron, also known as the Preventative Squadron, was a squadron of the British Royal Navy whose goal was to suppress the Atlantic slave trade by patrolling the coast of West Africa. Formed in 1808 after the British Parliament passed the Slave Trade Act 1807 and based out of Portsmouth, England, it remained an independent command until 1856 and then again from 1866 to 1867.
HMS Pelorus was an 18-gun Cruizer-class brig-sloop of the British Royal Navy. She was built in Itchenor, England and launched on 25 June 1808. She saw action in the Napoleonic Wars and in the War of 1812. On anti-slavery patrol off West Africa, she captured four slavers and freed some 1350 slaves. She charted parts of Australia and New Zealand and participated in the First Opium War (1839–1842) before becoming a merchantman and wrecking in 1844 while transporting opium to China.
The liberated Africans of Sierra Leone, also known as recaptives, were Africans who had been illegally enslaved onboard slave ships and rescued by anti-slavery patrols from the West Africa Squadron of the Royal Navy. After the British Parliament passed the Slave Trade Act 1807, which abolished Britain's involvement in the slave trade, the Admiralty established the West Africa Squadron to suppress the trade in cooperation with other Western powers. All illegally enslaved Africans liberated by the Royal Navy were taken to Freetown, where Admiralty courts legally confirmed their free status. Afterwards, they were consigned to a variety of unfree labor apprenticeships at the hands of the Nova Scotian Settlers and Jamaican Maroons in Sierra Leone. During the 19th century, it has been estimated by historians that roughly 80,000 illegally enslaved Africans were liberated by the Royal Navy.
The third HMS Black Joke was probably built in Baltimore in 1824, becoming the Brazilian slave ship Henriquetta. The Royal Navy captured her in September 1827, and purchased her into the service. The Navy renamed her Black Joke, after an English song of the same name, and assigned her to the West Africa Squadron. Her role was to chase down slave ships, and over her five-year career, she freed thousands of slaves. The Navy deliberately burnt her in May 1832 because her timbers had rotted to the point that she was no longer fit for active service.
Cape Mesurado, also called Cape Montserrado, is a headland on the coast of Liberia near the capital Monrovia and the mouth of the Saint Paul River. It was named Cape Mesurado by Portuguese sailors in the 1560s. It is the promontory on which African American settlers established the city now called Monrovia on 25 April 1822.
Vice Admiral Joseph Denman was a British naval officer, most noted for his actions against the slave trade as a commander of HMS Wanderer of the West Africa Squadron.
HMS Tigress was the American merchantman Numa and then French letter of marque Pierre Cézar that the Royal Navy acquired by capture and put into service as the gunbrig Tigress. She spent some time on the West African coast in the suppression of the Triangular slave trade. The Admiralty later renamed her as Algerine. She was broken up in 1818.
The Flag Officer, West Africa (FOWA) was a military command of the British Royal Navy during the Second World War. It existed from 1942 to 1945.
HMS Nimble was a Royal Navy 5-gun schooner-of-war. She was employed in anti-slave trade patrol from 1826 until 1834, when she was wrecked on a reef with the loss of 70 Africans who had been rescued from a slave ship.
African Slave Trade Patrol was part of the Blockade of Africa suppressing the Atlantic slave trade between 1819 and the beginning of the American Civil War in 1861. Due to the abolitionist movement in the United States, a squadron of U.S. Navy warships and Cutters were assigned to catch slave traders in and around Africa. In 42 years about 100 suspected slave ships were captured.
HMS Thais was built for the British Royal Navy in 1806 and was the name-vessel of her class of fire ships. Between 1811 and 1813 she served in the West Africa Squadron, which was attempting to suppress the slave trade. During this service she captured several slave traders and an American privateer. She made one voyage to the East Indies. Thais was sold in 1818. She then became a merchantman. She was last listed in 1826.
Donna Marianna was a vessel that left Liverpool in 1809. On 22 May 1810 HMS Crocodile seized Donna Marianna for breach of the Act for the abolition of the slave trade. The Vice admiralty court at Freetown, Sierra Leone, condemned Donna Mariana and her owners appealed the decision. The result of the appeal was a finding against the owners in a case that became an important milestone in the suppression of the slave trade.
Kitty was a French vessel taken in prize c. 1810. She became a West Indiaman and then, following a change of ownership, a privateer. She was one of only two British privateers to target slave traders. She captured three off Sierra Leone before one of her targets captured her in 1814, killing her master, enslaving some of her crew, and setting fire to her.
HMS Saracen was a Cherokee-class brig-sloop of the Royal Navy. Launched 30 January 1831 at the Plymouth Dockyard, at Plymouth, England, this vessel held a gun deck of eight 18-Pounder carronades and two 6-Pounder bow chasers. She also held a crew complement of 75. Henry Worsley Hill served as her commander starting on 15 March 1841.
United States of America 
United States Navy