Method used by the Mongols to facilitate their control over the vast empire:

The Mongols, led by Genghis Khan, established one of the largest empires in history, stretching from Asia to Europe. They employed various methods to maintain control over their vast territories, ensuring the stability and efficiency of their empire.

1. Effective military strategies:
- The Mongols were exceptional horsemen and skilled warriors, using a combination of cavalry, archers, and siege warfare techniques. Their military strategies were focused on speed, mobility, and surprise attacks, allowing them to conquer vast territories quickly.
- They utilized advanced tactics, such as feigned retreats and ambushes, to confuse and overpower their enemies.
- The Mongols also adopted new technologies and weapons from conquered regions, incorporating them into their armies.

2. Centralized administration:
- Genghis Khan established a centralized administration system, dividing the empire into various administrative units called "ulus." Each ulus was ruled by a trusted family member or loyal general, ensuring effective governance and control over the regions.
- The Mongols appointed capable administrators and officials from diverse ethnic backgrounds to govern the conquered lands, promoting stability and minimizing resistance.
- They implemented a system of taxation, facilitating the collection of revenue to support the empire's military and administrative needs.

3. Promotion of trade and communication:
- The Mongols actively encouraged trade and commerce within their empire, promoting the exchange of goods and ideas across regions.
- They built an extensive network of roads and trade routes, including the famous Silk Road, facilitating the movement of goods, people, and information.
- The Mongols also established a reliable postal system known as the "yam," which enabled the quick transmission of messages and orders throughout the empire, enhancing communication and control.

4. Religious tolerance and cultural assimilation:
- The Mongols practiced religious tolerance, allowing their subjects to freely practice their own religions and traditions.
- They adopted aspects of the local cultures and religions of the conquered territories, fostering a sense of unity and assimilation.
- Mongol leaders often married into local noble families, forging alliances and promoting intercultural understanding.

5. Effective use of propaganda:
- The Mongols utilized propaganda to maintain control over their vast empire. They spread fear and intimidation among their enemies, often exaggerating their military strength and brutality.
- Genghis Khan and his successors also implemented a system of rewards and punishments, incentivizing loyalty and obedience among their subjects.

Conclusion:
Through their effective military strategies, centralized administration, promotion of trade and communication, religious tolerance, and use of propaganda, the Mongols were able to facilitate their control over their vast empire. These methods ensured the stability and efficiency of their rule, allowing them to sustain their empire for several generations.