After an emissary of Muhammed on his way to Bosra is executed on orders of Ghassanid official Shurahbil ibn Amr, Muhammed dispatches his troops.  This would ultimately result in the Battle of Mu'tah.  

Celaleddin Harezmsah takes the throne of his occupied country after his father's unexpected illness. Even though his means are limited, he starts an epic resistance against Genghis Khan and the Mongols.