


This was also the day Zuko stood up to his father and proclaimed that he would help Team Avatar defeat him, as well as the day Iroh broke out of prison and escaped to the Earth Kingdom, paving the way for the eventual liberation of Ba Sing Se by the Order of the White Lotus. While the Day of Black Sun had been a loss for the forces storming the capital, other battles against the Fire Nation were successful, as King Bumi found the eclipse to be "the right moment to strike" and single-handedly liberated the city of Omashu, thus beginning the eventual liberation of occupied regions in the Earth Kingdom. The invasion force managed to reach the Fire Nation Royal Palace but were unable to escape after the eclipse ended, leading to the detainment of the adult participants while the younger members fled on Appa. Due to this mistake, the Fire Nation was able to anticipate and prepare for the assault. However, the Fire Nation became aware of the imminent attack when Azula, Mai, and Ty Lee had infiltrated Ba Sing Se and were informed about the plans by Earth King Kuei, believing them to be allies of the Earth Kingdom. On the Day of Black Sun that occurred on the first day of the eight month in 100 AG, the Fire Nation Capital was invaded, with the objective of quickly defeating Fire Lord Ozai and ending the Hundred Year War.

The date upon which this phenomenon occurred was the nineteenth day of the seventh month of the cultivate rule ( 培治) of the Year of the Dragon, as indicated on a paper Sokka found in Wan Shi Tong's Library. The first recorded Day of Black Sun was considered to be "the darkest day in Fire Nation history".
