Battle at Wulong Forest

The Battle in the Wulong Forest was the final battle of the century long War, and coincided with the Battle of Ba Sing Se. It was an emphatic defeat for the Fire Nation. Fire Lord Ozai was stripped of his firebending, and Avatar Aang became fully realized and regained his ability to use the Avatar State. The entire Fire Nation armada of Airships were destroyed. The Avatar's victory in this battle effectively decided the outcome of The War, with the defeat of the Fire Nation.

History
A few months after the Fire Nation had secured victory in Ba Sing Se, it was brought to Fire Lord Ozai's attention that Fire Nation armies were failing to secure total victory over the Earth Kingdom due to rebellion. Prince Zuko advised that it was unlikely that the rebellions would stop while the Earth Kingdom people had hope. Princess Azula suggested that they burn the Earth Kingdom to the ground. Ozai consented to this plan.

Weeks later, when Zuko became aware of Aang's plan to face the Fire Lord after Sozin's Comet, Zuko warned the Avatar of Ozai's intentions. Later, Aang went sleepwalking and ended up on a mysterious island. This island, revealed to be a Lion Turtle, moved Aang to the site where Ozai intended to begin his attack, Wulong Forest. Meanwhile, three members of Team Avatar, Sokka, Toph and Suki, moved to intercept the Airship fleet at their base at an island near the coast.

The Battle
Sokka, Toph and Suki were able to board an airship and hijack it after a short battle and a "special birthday" ruse. However, they proved to be unable to catch up to the Fire Lord's own airship, which was further ahead, leaving Fire Lord Ozai unopposed when he began burning down the forest. Aang however was waiting for Ozai, and proceeded to destroy Ozai's lead airship with earthbending and firebending, forcing Ozai to propel himself off the ship and onto a rock tower. Ozai gleefully stated that the universe had delivered Aang to him as an "act of providence" before shooting fire blasts at him, beginning their duel.

Watching the beginning of this duel, Sokka decides that the Fire Lord was "Aang's fight", and suggests that they destroy the Airship Fleet. Drawing inspiration from a "Airbending Slice", Sokka manoeuvres the hijacked airship around and crashes it into the other airships before escaping to the top of it. Sokka and Toph are separated from Suki as their ship begins to break up, and they are forced to continue without her.

Meanwhile, the Aang and Ozai are equally matched in skill, but Ozai, taking advantage of Aang's indecision and unwillingness to kill even when presented with the chance, soon gains the upper hand, sending the Avatar falling into a lake below, who only saves himself from a fatal fall with waterbending. Ozai soon catches up to Aang. Aang encases himself in a earth ball, not wanting to fight. Ozai said that he was "weak just like the rest of his people" and proceeds to cover the ball in fire.

Sokka and Toph meanwhile continue to destroy the airship fleet. However, they are spotted by Fire Nation soldiers, and are soon seemingly doomed. They are suddenly saved however by an airship that crashes into the one they are on. They land on it and discover that Suki was driving it and had saved them. It later becomes clear that this airship was the last operable one, the other fifteen having been destroyed.

Meanwhile, not able to withstand the power for much longer, Aang hits his back on a small piece of rock, recovering his ability to use the Avatar State, entering it. While in the Avatar State, Aang gathers the four elements and gains the upper hand, sending the Fire Lord to the brink of defeat. Aang is about to strike down Ozai, but he comes out of it and states that he does not want to end it this way. Ozai attempts to strike while Aang's back is turned but Aang uses Earthbending to pin him down and then used Energybending, learned from a Lion Turtle earlier, to strip Ozai of his bending, defeating him.

Aftermath
After the battle Aang used Avatar level Waterbending to put out the fire in the forest. Sokka, Suki, and Toph all arrive and start to taunt Ozai, calling him the 'Loser Lord' (Sokka), 'Phoenix King of Getting His Butt Whooped' (Toph) and 'King Of The Guys Who Don't Win' (Suki). Later on, it is shown that Ozai had been placed in the jail near the Fire Nation Capital, where Fire Lord Zuko confronts him on where his mother is.