Introduction
Genghis Khan, born as Temujin, was a Mongol warrior and military leader who rose to power in the early 13th century. He founded the Mongol Empire, one of the largest contiguous empires in history. Genghis Khan was not the ruler of any of the options mentioned in the question. He was the ruler of the Mongols.

Genghis Khan and the Mongols
- Genghis Khan united the various Mongol tribes and clans under his leadership to establish the Mongol Empire. He was able to bring together the nomadic tribes of the steppes and create a highly organized and disciplined army.

The Mongol Empire
- The Mongol Empire stretched from Eastern Europe to Asia and was the largest empire in history at its peak. It encompassed regions such as China, Central Asia, Persia, and parts of Eastern Europe.
- Genghis Khan's military campaigns and conquests were instrumental in the expansion of the Mongol Empire. The empire grew through a series of successful military campaigns, which included the conquest of the Jin Dynasty in China, the Khwarazmian Empire in Persia, and the Kievan Rus' in Eastern Europe.
- The Mongol Empire had a significant impact on the regions it conquered. It brought stability and security to the trade routes along the Silk Road, facilitated cultural and technological exchange, and promoted the spread of ideas and knowledge.

Genghis Khan's Leadership
- Genghis Khan was known for his exceptional military strategy and tactics. He implemented a system of highly mobile cavalry units, known as the Mongol Army, which proved to be highly effective in battle.
- He also introduced several administrative and social reforms within the Mongol Empire. He established a code of laws known as the Yassa, which governed various aspects of Mongol society, including military discipline, trade, and religious tolerance.
- Genghis Khan emphasized meritocracy and rewarded loyalty and competence within his empire. He appointed capable individuals to key positions and encouraged innovation in various fields, including administration, technology, and warfare.
- Despite his military conquests and reputation as a fearsome warrior, Genghis Khan also showed pragmatism and tolerance towards the conquered peoples. He allowed religious freedom and often incorporated local customs and traditions into the Mongol Empire.

Conclusion
In conclusion, Genghis Khan was the ruler of the Mongols, not any of the options mentioned in the question. He established the Mongol Empire through his military campaigns and leadership skills. The Mongol Empire had a significant impact on the regions it conquered and left a lasting legacy in history.