Final answer:
Elephants were used by the early kingdom of Java to defeat the Mongols.
Explanation:
Elephants were used by the people of the early kingdom of Java to help defeat the Mongols. Elephants have been utilized for military purposes since antiquity, forming an elephantry as a cavalry equipped with elephants instead of horses. The Mongols, who never used elephants themselves, would counter enemy elephantry by setting light to straw tied to camels' backs to scare the elephants.
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