Sengbe Pieh, also known as Joseph Cinqué or Cinquez and sometimes referred to mononymously as Cinqué, was a West African man of the Mende people who led a revolt of many Africans on the Spanish slave ship La Amistad in July 1839. After the ship was taken into custody by the US Revenue-Marine, Cinqué and his fellow Africans were eventually tried for mutiny and killing officers on the ship, in a case known as United States v. The Amistad. This reached the U.S. Supreme Court, where Cinqué and his fellow Africans were found to have rightfully defended themselves from being enslaved through the illegal Atlantic slave trade and were released. The US government did not provide any aid to the acquitted Mende People. The United Missionary Society, a black group founded by James W.C. Pennington, helped raise money for the return of thirty-five of the survivors to Sierra Leone in 1842.

The Mende are one of the two largest ethnic groups in Sierra Leone; their neighbours, the Temne people, constitute the largest ethnic group at 35.5% of the total population, which is slightly larger than the Mende at 31.2%. The Mende are predominantly found in the Southern Province and the Eastern Province. The Mende are mostly farmers and hunters. Some of the major cities with significant Mende populations include Bo, Kenema, Kailahun, and Moyamba.