يوسف بن تاشفين
Having quelled the discontent back in the Sahara, Abu Bakr returned north to Morocco in 1072. But Yusuf ibn Tashfin had enjoyed his taste of power, and was reluctant to give it up. Pushed by his new wife, Zaynab, Yusuf met Abu Bakr in the plain of Burnoose (between Marrakesh and Aghmat) and, by negotiation (rather than force), persuaded him to abdicate the northern dominions to him. As a courtesy to his former leader, Yusuf kept Abu-Bakr's name on the Almoravid coinage until his death.