Earthbender rebellions

The Earth Kingdom rebellions were armed uprisings against the Fire Nation, formed during the later stages of the War at an unknown time after the Coup of Ba Sing Se in 100 ASC. Its success surprised and alarmed the Fire Nation; it was admitted by General Shinu that the powerful Fire Nation armies in the Earth Kingdom were insufficient to put down the threat and that Fire Nation domestic forces were required for reinforcement.

The uprisings and their successes were mentioned to Fire Lord Ozai in a war meeting a day before the eclipse and Invasion of the Fire Nation. Acting upon this crucial information, Ozai decided to use the astounding power of Sozin's Comet to burn down the Earth Kingdom, ending the rebellion once and for all. The plan proved to be an astronomical failure, however, with Ozai's defeat in the Battle at Wulong Forest.

Following the War's conclusion and newly crowned Fire Lord Zuko's announcement of an era of peace and love, the rebellions presumably ceased.

Liberation of Omashu


On the Day of Black Sun, King Bumi successfully broke free of his metal chamber and, taking advantage of the soldiers' loss of firebending, he used his exemplary earthbending abilities to defeat all of the powerless guards and soldiers trying to stop him. With the guards out of the way, Bumi began to retake his city.

With extremely powerful earthbending moves, Bumi cast out every Fire Nation-constructed building, and to signify Omashu's liberation, Bumi destroyed the statue of Fire Lord Ozai, but not after mocking Ozai by placing a smiley face on it. With effort, he elevated the earth underneath the statue, causing it to crash right into the governor's house and destroy the metal bridge over the abyss immediately after the guards had crossed it.

The liberation of Omashu was a disaster for the Fire Nation, and it proved to be the beginning of the Earth Kingdom's ultimate liberation from the Fire Nation Armies.

Liberation of other minor towns
Omashu wasn't the first town to be liberated from the Fire Nation's suppression; by making a detour to the prison rig, Katara had inspired the many captured earthbenders to stand up again against the Fire Nation forces, starting the liberation of many small Earth Kingdom towns, like the mining village where Haru lived. Under the leadership of Tyro and his son Haru, that village's population was successful in reclaiming their town after years of enslavement and persecution.