After the death of the Leper King Baldwin IV in 1185, the Crusader Kingdom of Jerusalem fell into turmoil. Two years later, Saladin invaded with a massive army.  To face him, Guy de Lusignan, newly crowned king of Jerusalem, mustered every man who could bear arms.  On July 4, 1187, the two armies met beneath the Horns of Hattin. At the end of the day, the host of Jerusalem had been wiped out.