Islam was introduced in Senegal during the 8th and 9th centuries by Berber merchants. They peacefully converted the Toucouleurs and Sarakholles who in turn propagated it. Later on, in the 11th century, the Almoravids, with the help of the Toucouleurs used Jihad as a mean of conversion. This movement faced resistance from ethnicities of traditional religion, the Serers in particular. Eventually, Berbers won a peaceful conversion among the Wolofs with the intervention of leaders like Cheikh Ahmadou Bamba, El Hadj Malick Sy, and Seydina Limamou Laye who were able to convince their followers. They saw Islam as a way to unite and fight against colonial power. The populations were getting weary of repeated jihads and forced colonization. Europeans missionaries introduced Christianity to Senegal and the Casamance in the 19th century. An emblematic figure of Casamance is Aline Sitoe Diatta, a woman who led the resistance movement against European colonialists.
It was only in the 1850s that the French began to expand onto the Senegalese mainland (by now rid of slavery and promoting abolitionist doctrine), adding native chiefdoms such as Waalo, Cayor, Baol, and Jolof. Senegalese chiefs' resistance to the French expansion and curtailing of their lucrative slave trade was led in part by Lat-Dior, Damel of Cayor, and Maad a Sinig Kumba Ndoffene Famak Joof, the Maad a Sinig of Sine, resulting in the Battle of Logandème.
On 4 April 1959 Senegal and the French Sudan merged to form the Mali Federation, which became fully independent on 20 June 1960, as a result of the independence and the transfer of power agreement signed with France on 4 April 1960. Due to internal political difficulties, the Federation broke up on 20 August, when Senegal and French Sudan (renamed the Republic of Mali) proclaimed independence. Léopold Senghor was proclaimed Senegal's first president in September 1960. Senghor was a very well read man, educated in France. He was a
