Battle of Tabankort Ahmed al-Tilemsi, nom de guerre of Abderrahmane Ould El Amar (Arabic: عبد الرحمن ولد العامر) was a Malian jihadist leader and drug trafficker who served as a founding member and senior figure of the Movement for Oneness and Jihad in West Africa (MUJAO) and a senior figure and alleged emir of al-Mourabitoun.

[3] However, Mauritanian journalist Lemine Ould Mohamed Salem states that Tilemsi was not actively a jihadist before the start of the Mali War in 2012.

[2] Tilemsi was instead one of the largest drug traffickers in Mali prior to 2012, and part of a pro-government militia close to Malian colonels Mohamed Abderrahmane Ould Meydou and El Hadj Ag Gamou.

"[8] In November 2012, Tilemsi and Sultan Ould Bady participated in the kidnapping of French tourist Gilberto Rodrigues Leal, whose death was announced in 2014.

[8][2] French authorities also suspected Tilemsi of being involved in the kidnappings of Antoine de Leocour and Vincent Delory, both of whom were killed on January 8, 2011 during the Battle of Tabankort.