The Battle of Hattin (also known as "The Horns of Hattin" because of a nearby extinct volcano of the same name) takes place on Saturday, July 4, 1187, between the Crusader Kingdom of Jerusalem and the forces of the Ayyubid dynasty.The Muslim armies under Saladin capture or kill the vast majority of the Crusader forces, removing their capability to wage war.

As a direct result of the battle, Islamic forces once again become the eminent military power in the Holy Land, re-conquering Jerusalem and several other Crusader-held cities.

These Christian defeats prompt the Third Crusade, which begins two years after the Battle of Hattin.