The world has reached its turning point. Avatar Aang has failed. When they had their final battle, Aang was unable to complete the removal of Ozai’s bending. Despite this, the day was not lost. Unknowing of the Avatar’s defeat, the white lotus successfully retook Ba Sing Se and restored the great nation of the Earth Kingdom. With Ozai’s air fleet in ruins he was unable to complete the genocide of the Earth Kingdom. _ years have past. Aang was killed back in the confrontation of Ozai, Zuko was sent into exile yet again, and died trying to start a rebellion. Sokka took Katara back to the Southern water tribe and together they spent their time rebuilding their home. Toph went into exile with the sand benders, before leaving to re-unite with her family. She is now an agent of the White Lotus.
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If anyone wants to expand on this basic sketch or wish to provide an idea of how many years have passed, please PM me.