| | Abu Yusuf Yakub al-Mansur Biography |
 | | Abu Yusuf Yakub al-Mansur (reigned 1184-1199) was the third caliph of the Almohad dynasty and the victor against the Spanish Christians at the battle of Alarcos. |
| | However, upon his withdrawal to Morocco and the diversion of his efforts to Spain, the Banu Ghaniya soon succeeded in challenging Almohad sovereignty in the east, which was too far removed from the seat of Almohad power to keep under permanent control without a large army of occupation. |
| | In Spain, Yakub's military success was equally spectacular and equally ephemeral; here, as in North Africa, the Almohad campaign was a response to the invasion of their territory, though in Spain the response amounted to holy war since the invaders were Christians, led by Alfonso VIII of Castile. |
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