Mongolian rule Under Genghis Khan, the Mongols conquered Transoxania in 1218, Khorasan and Northern Iran to Azerbaijan in 1220, devastated the areas, burned valuable art and literature and caused bloodbaths among the population. In 1256 the second onslaught followed under Hülägü, which brought Iran into the power of the non-Islamic dynasty of the Ilkhane (1256…