Being frozen in an iceberg for 100 years while in the Avatar State drained much of Aang's life energy. While he did not feel the effects for many years, after he entered middle age in his 50s, the strain of this exertion increasingly weighed upon his body. Ultimately, it resulted in Aang dying at the relatively young biological age of 66 since he was in the ice for 100 years, in 153 AG. Aang was survived by his wife, Katara, and his three children, but he did not live to see his grandchildren, all of whom would become powerful airbenders. Prior to his death, Aang tasked the Order of the White Lotus with finding and guiding the new Avatar after him. When Aang died, the Avatar spirit reincarnated into Korra of the Southern Water Tribe. Aang intended for the Order to simply guide and guard Korra, but several mishaps in the aftermath of Aang's death (including a kidnapping attempt by the anarchist Zaheer) and the still-fragile state of relations between the now-Five Nations resulted in Katara and Tenzin sequestering Korra in a compound at the South Pole, bringing teachers to her instead of allowing her to seek out her own.