France assumed the status of protector by signing treaties with Gabonese coastal chiefs in 1839 and 1841. American missionaries from New England established a mission at Baraka (now Libreville) in 1842. In 1849, the French captured a slave ship and released the passengers at the mouth of the Komo River. The slaves named their settlement Libreville-"free town."
French explorers penetrated Gabon's dense jungles between 1862 and 1887. The most famous, Savorgnan de Brazza, used Gabonese bearers and guides in his search for the headwaters of the Congo River. France occupied Gabon in 1885 but did not administer it until 1903. In 1910, Gabon became one of the four territories of French Equatorial Africa, a federation that survived until 1959. The territories became independent on August 17, 1960 as the Central African Republic, Chad, Congo-Brazzaville, and Gabon.