Final answer:
Genghis Khan and his successors were able to conquer vast amounts of land due to their highly organized and disciplined army, the ability to form alliances, and their strong military and administrative system. They maintained their rule through effective communication networks and allowing local rulers to retain some autonomy.
Step-by-step explanation:
Genghis Khan and his successors were able to conquer vast amounts of land due to a combination of factors. Firstly, the Mongols had a highly organized and disciplined army that relied on fast cavalry tactics, expert archery, and siege warfare. Their military was highly effective and they often caught their enemies by surprise.
Secondly, the Mongols were skilled at forming alliances with other nomadic tribes and exploiting divisions among their enemies. They were able to unite various tribes under their rule and gain support from local populations who were dissatisfied with their current rulers.
In addition, the Mongols had a strong military and administrative system that helped them maintain their rule over the conquered territories. They established a highly efficient communication network known as the Yam, which allowed for swift communication across their vast empire. They also had a system of government that allowed local rulers to retain some autonomy while pledging loyalty to the Mongol Khan.