One of the most highlighted is the mansa's betrayal by Hammad Amina, the chief of the Fulbe at Masina.[1] Previously, Amina had promised support in taking Jenné, but went over to the Moroccans with whom he already had a king-vassal type relationship.[11] He advised the Moroccans on what to expect from the Mandinka-Bamana force and kept his own forces from joining the battle.[3] The Fulbe are not mentioned as lending military aid to Jenné's defenders, but their absence from the battlefield may have had a great effect on the final outcome.