Flooding your nation is when your nation gets flooded... bitch. The Water Tribe was jealous that they didn't have a method of nation destruction like the Fire Nation did so they actually took the time to come up with this. A giant group of waterbenders take millions of gallons of water and then they launch it at your nation causing DOOM and DESTRUCTION. This method has never ACTUALLY been achieved yet, but the Water Tribe likes to pretend it has. Jet attempted to use this at one point but epicly failed for his troubles because it's for waterbenders only and anyone else who tries to must fail or else.

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