Kings and Generals are starting a new historical animated documentary series on the Third Crusade. The fall of Jerusalem to the Ayyubid sultan Saladdin in 1187 prompted the Christian kingdoms to start another Crusade against the Muslims in order to restore the Crusader Kingdoms in the Levant. The Third Crusade will be led by the Holy Roman Emperor Frederick Barbarossa, the French king Philip Augustus and the English king Richard the Lionheart - the battle of Acre of 1189 would be the first significant engagement of this conflict.