Final answer:
After uniting the Mongols, Genghis Khan's armies engaged in various military conquests using unique battlefield tactics to expand their empire. They struck terror in their enemies, looted cities, and continued the wars even after Genghis Khan's death.
Step-by-step explanation:
After uniting the Mongols, Genghis Khan's armies engaged in various military conquests to expand their empire. They used unique battlefield tactics, such as feigning defeat and ambushing the pursuing enemies, as well as launching night assaults and creating the illusion of a larger army with fires.
The chief aim of the Mongol generals was to strike terror in their enemies and loot cities to send a message of futility to those who resisted. Genghis Khan's sons and grandsons continued these wars after his death, conquering territories from Europe to Asia.