Nothing like a small mammal to drive terror into an adversary's heart.
How do military leaders come up with these? In the case of the U.S., military commands are assigned blocks of the alphabet, say from AA to AD, from which they can choose two word names. Such as Agile Diver. The rules forbid "commercial trademarks," "anything offensive to good taste," or that are similar in spelling to a code word.
They also set aside words for certain commands. "Cheese," for example, is only to be used by the chief of naval operation's office. Ditto "rabbit."
(Great Britain's Prime Minister Winston Churchill specifically warned about "frivolous" words, saying no one would want to tell a grieving mother her son died in an operation named "Bunnyhug.")
Here's a totally objective guide to the worst-named military operations and exercises of all time.