 From the 15th to the 19th century, European contact with Mauritania was dominated by the trade for gum arabic.Rivalries among European powers enabled the Arab-Berber population, the Maures (Moors), to maintain their independence and later to exact annual payments from France, whose sovereignty over the Senegal River and the Mauritanian coast was recognized by the Congress of Vienna in 1815.Although penetration beyond the coast and the Senegal River began in earnest under Louis Faidherbe, governor of Senegal in the mid-19th century, European conquest or "pacification" of the entire country did not begin until 1900.