The story of Genghis Khan using 1,000 cats to conquer a city is actually a myth and has no historical basis. While Genghis Khan was indeed a brilliant military leader who employed various strategies to expand his empire, there is no evidence to suggest that he ever used cats or any similar tactic in his conquests.

This story is likely a legend that has been embellished or fabricated over time. Genghis Khan's conquests were mainly achieved through his military prowess, strategic planning, and the effective organization of his army, rather than through the use of unconventional or fantastical methods.

It's important to approach historical anecdotes critically and verify their authenticity through reliable sources before accepting them as fact.