A fact about elephants that I learned from Casual Geographic, is that elephants are super stealthy. They have REALLY soft feet and are dead silent when they choose to be.
So you could imagine a team of shinobi riding massive pachyderms at night to ambush a group of enemies and none of them would see or hear the former coming.
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https://www.youtube.com/watch?v=GdUJrafZXMU