"Liberia is the only black state in Africa never subjected to colonial rule and is Africa’s oldest republic. It was established on land acquired for freed U.S. slaves by the American Colonization Society, which founded a colony at Cape Mesurado in 1821. In 1824 the territory was named Liberia, and its main settlement was named Monrovia, which is the present-day capital. Liberian independence was proclaimed in 1847, and its boundaries were expanded."
https://www.britannica.com/place/Liberia
"The people of Liberia are classified into three major groups: the indigenous people, who are in the majority and who migrated from the western Sudan in the late Middle Ages; black immigrants from the United States (known historically as Americo-Liberians) and the West Indies; and other black immigrants from neighbouring western African states who came during the anti-slave-trade campaign and European colonial rule. The Americo-Liberians are most closely associated with founding Liberia. Most of them migrated to Liberia between 1820 and 1865; continued migration has been intermittent. Americo-Liberians controlled the government until a military coup in 1980."