Alhandega (Moorish Empire in Spain).
Fought 939, between the Moors under Abd al Rahman, and the Christians under Ramiro II of Leon. The Moors, 100,000 strong, were besieging Zamora, when they were attacked by Ramiro, who, aided by a sortie of the garrison, utterly routed them. In the battle 20,000 Moors fell, and 40,000 are said to have been drowned in the moat surrounding the city.