He was of the
Zenata Berber tribe. He founded the Zayyanid state in 1235, and warred with the
Almohad Caliphate until 1248. He was successful in his military campaigns against the
Merinids and the
Maqil Arab tribe. The governor of
Ceuta, Abou'l-Hassan ben-Khelas, had revolted against the Almohads and recognised the sovereignty of Yaghmurasen, after this the Almohad ruler decided to march against Tlemcen but was defeated by Yaghmurasen. When the Almohad Caliph marched against him, Yaghmurasen defeated him in the
Battle of Oujda, the Almohad Caliphs head was taken and ordered to be shown to his mother. ==Name==