Final answer:
The outlined region on the map represents the Mongol Empire, which was the largest contiguous land empire in history and included various khanates at its peak.
Step-by-step explanation:
The dotted region marked on the partial outline map depicting countries from Iran to North Korea corresponds to the Mongol Empire at its greatest extent. This empire, which was the largest contiguous land empire in history, flourished under the leadership of Chinggis Khan (Genghis Khan). After his death, the empire fragmented into four major khanates: the Yuan dynasty in China, the Chagatai Khanate, the Il-Khanate, and the Golden Horde. Its expansive reach was a result of the various conquests and exploratory campaigns led by the Mongols, stretching from Europe to the east of Asia.