This massive stretch of arctic tundra covers most of the North Pole. The treacherous terrain makes it impossible for anyone to live there. Only highly skilled, arctic hunters travel on the terrain, hunting the animals that live there, and they never stay longer than a few days at a time. Heavy winter blizzards constantly pelt the tundra, and unstable ice sheets often give way under the slightest pressure. Even experienced Waterbenders and warriors think twice about venturing into this dangerous environment. During the war, the Fire Nation conducted continuing raids against the Southern Water Tribe, resulting in the depletion of their Waterbenders and leaving their tribe defenseless. The Fire Nation may have attempted to do this against the Northern Water Tribe but due to the harsh terrain surrounding the pole and high level security that the tribe has made it impossible and too life risking to do such a task.