After Asmai and Korra left for the spirit world Kuvira and Baatar Jr escaped custody and the war started again. During the war the earth kingdom was under their control. During their years of control they conceived a son. The 3 other nations teamed up to fight the Earth Empire. The war was gonna be known as the Earth Empire Vs the 3 nations. Soldiers who tried to infiltrate the Earth Empire capital world go missing. If any soldiers from the other 3 nations were found by Earth Empire soldiers they too would go missing. 1000 soldiers were under 18, 350 of those soldiers were taken 100 were airbenders. Kai was of the 100 to be taken.
9 parts