The Battle of Fandane-Thiouthioune also known as the Battle of Somb occurred on 18 July 1867. It was a religious war between the Serer people and the Muslim Marabouts of Senegambia, but also had a political and economic dimension : vendetta and empire-building. Fandane, Thiouthioune and Somb were part of the pre-colonial Serer Kingdom of Sine now part of independent Senegal. The Muslim army was led by the Islamic religious leader Maba Diakhou Bâ, whilst the Serer army was led by the King of Sine - Maad a Sinig Kumba Ndoffene Famak Joof.
In the early hours of the battle, the Muslim Marabouts prevailed but the Serer army held firm. In the latter part of the battle, the Marabouts were defeated. Maba Diakhou was killed and his body decapitated. Damel-Teigne Lat Jor Ngone Latir Jop and Bourba Jolof Alboury Sainabou Njie—respective kings of Cayor and Baol, and Jolof, and part of Maba's army fled the battlefield. Maad a Sinig Kumba Ndoffene Famak was victorious but injured. Maba's general - Mama Gaolo Nyang was held prisoner.