After Avatar Korra died, the world went into peril. The Northern Water Tribe and Earth Kingdom were no part of the feud, the Fire Nation and Southern Water Tribe went into war. After Avatar Yuri, the Earth Avatar died, trying to end the war, it got worse. The Southern Water Tribe blamed the Fire Nation for killing the Avatar so the advantage of having a Fire Avatar would become a advantage to the war, they denied it. Before Yuri died, somehow, he made sure the Southern Water Tribe and Fire Nation could not touch each other, so the war would make no sense. The Water Tribe would burn, the Fire Nation would freeze. But, only the royal family was able to bear the curse, but couldn't hold it for more than a few minutes.
