Coup of Ba Sing Se

The Coup of Ba Sing Se, also known as the Fall of the Earth Kingdom or the Fall of Ba Sing Se, was an event which took place in 100 ASC. During the coup, Princess Azula of the Fire Nation, aided by her allies Mai and Ty Lee, disguised themselves as Kyoshi Warriors, infiltrated the Earth Kingdom capital city of Ba Sing Se, took control of the Dai Li, and orchestrated a coup of the 52nd Earth King. Because Ba Sing Se was the last great Earth Kingdom stronghold left in the world, the coup was a major defeat for the enemies of the Fire Nation, and it placed both Ba Sing Se and the entire Earth Kingdom under the Fire Lord's control. The final major military operation of the Fire Nation in the Earth Kingdom until the coming of Sozin's Comet a few months later, the event also caused Azula's brother, Prince Zuko, to fight for and return to the Fire Nation.

History
Aang and Team Avatar decided to journey to Ba Sing Se after they returned from being lost in the Si Wong Desert. This was partly because Sokka had discovered that firebenders would lose their bending during a solar eclipse from information gathered at Wan Shi Tong's Library and needed to tell the Earth King. They also traveled to the city because Appa had been stolen and sold to merchants, and would likely be taken to Ba Sing Se.

After getting out of the desert the group took a deadly route to get to the Outer Wall, and foiled a Fire Nation plan to invade the city. Once they finally got into the city, however, they discovered that all was not as it seemed. Long Feng, Grand Secretariat of Ba Sing Se, was using his Dai Li agents to keep knowledge of the War suppressed and was controlling the city by manipulating the Earth King.

Zuko and Iroh had also entered Ba Sing Se, but as unnoticed refugees. However, Jet suspected that they were firebenders. Iroh quickly gained a reputation as the "best tea-maker in Ba Sing Se". Unable to stand failing to expose Zuko and Iroh as firebenders any longer, Jet declared that Iroh and Zuko were firebenders at the Pao Family Tea House, the place where Iroh and Zuko worked, and then engaged Zuko in a sword duel. Jet was then captured by the Dai Li and brainwashed.

Team Avatar made a sustained effort to find Appa. While the group was pasting flyers to walls around the city, they discovered a brainwashed Jet and later, two members of the Freedom Fighters. After making Jet recall earlier memories, the group infiltrated the Dai Li base in an attempt to rescue Appa. They failed however, and Jet was killed. Meanwhile, after harsh words from Iroh, Zuko freed Appa from his prison beneath Lake Laogai. Appa flew out and immediately rescued Team Avatar from the Dai Li before reuniting with Aang.

The Avatar eventually confronted the Earth King, successfully proving to him both that the Earth Kingdom was at the War, and that Long Feng was corrupt. Long Feng was imprisoned, pending trial for crimes against the Earth Kingdom, but was soon satisfied that the Dai Li were still loyal to him.

Infiltration
Princess Azula and her friends Mai and Ty Lee were tracking the Avatar using a fur trail Appa left behind. However, instead of finding Aang, she found the Kyoshi Warriors who were taking care of Appa. Declaring that any friend of the Avatar was an enemy of theirs, Azula and her friends successfully attacked and captured the warriors, sending them back to a Fire Nation prison. Making a plan to infiltrate Ba Sing Se, Azula and her friends donned their uniform.



Team Avatar meanwhile had just received various pieces of good news and had split up temporarily, mostly to pursue personal goals. Two had even left Ba Sing Se. Azula and her friends were thus able to penetrate the city without coming under the scrutiny of Aang and his friends, which would have surely exposed them. Instead, Azula was welcomed warmly by an unsuspecting Earth King.

Having successfully infiltrated Ba Sing Se without meeting her most obvious obstacle, Azula immediately set to work on a plan for a coup knowing that the Dai Li were listening to the three's conversations. When arrested by the Dai Li, Long Feng spoke to her from inside his prison cell and the two agreed on a plan to overthrow the Earth King and the Council of Five by temporarily handing control of the Dai Li to the Fire Nation Princess. Azula agreed to this with plans of betrayal forming in her head.

Arrests
An immediate threat to Azula's planned coup was Katara who had direct access to the Council of Five and the Earth King and could inform them of threats. Katara was quickly eliminated however because she did not realize who they actually were at first sight and blurted out that Zuko and Iroh were in Ba Sing Se. Ty Lee quickly blocked her chi and Katara was thrown into the Crystal Catacombs of old Ba Sing Se.

Now with the knowledge that her uncle and brother were in the city, Azula attempted to remove them as threats. She lured them to the Royal Palace by telling them through a letter that the Earth King had asked them to serve tea to him. Although partially successful, Azula failed to capture her uncle who escaped after breathing fire against the Dai Li agents to buy time. She did however capture Zuko and the Dai Li threw him into the catacombs.



Aang and his friends had meanwhile returned to Ba Sing Se because Aang had a vision that Katara was in danger. The Earth King reassured them that she was alright. Aang and his friends' fears were quickly realized when they returned to their house, which was empty. Iroh then arrived moments later pleading for their help. After finding out crucial information from a captured Dai Li agent, Aang and Iroh went to rescue Zuko and Katara from the Crystal Catacombs while Sokka and Toph rushed to the Earth King to inform him of the planned coup.

Sokka and Toph were too late despite their efforts. Having already done an "inspirational" speech, Azula had put the plan into action. Sokka and Toph watched as General How was placed under house arrest. Rushing into the throne room, they tried to inform the Earth King, but were also too late, and when Azula threatened the Earth King's life, the two surrendered and were thrown into prison along with the Earth King. This proved only a minor impediment as, having learned metalbending, Toph breached the door to their cell almost as soon as they were in.

A freed Long Feng then appeared in the throne room with his Dai Li agents, and unsuccessfully ordered the Dai Li to arrest Azula. Azula then explained the situation to Long Feng; the Dai Li didn't know which of them was more powerful. She guessed that he was lower class by birth, but had managed to get his power through incredible work all his life; however, she declared that she had the “divine right to rule,” and confidently took the Earth King's throne. Long Feng surrendered, bowing to Azula, admitting how she beat him at his own game. Azula sneered that he was never even a player.

In the catacombs, Katara and Zuko had a deep discussion with unprecedented civility, and Katara offered to use her Spirit Oasis water to heal Zuko's scar. They were interrupted however by their rescuers, Aang and Iroh. Zuko was not impressed by the Avatar's presence, questioning his uncle about it. After Aang and Katara quickly left to help Sokka and Toph, Iroh attempted to convince his nephew to turn to good, but he was interrupted in turn by the arrival of Azula, whose Dai Li agents trapped Iroh in crystal. Azula then told Zuko that he could gain his honor and their father's love by helping him with her final obstacle to a successful coup, the Avatar, before leaving to intercept Aang, leaving Zuko pondering his options.

Battle in the Crystal Catacombs


Aang and Katara rushed to save Toph and Sokka; however, Azula found and attacked them, beginning a short engagement eventually resulting in Azula feeling fearful, being clearly outmatched. Zuko appeared, but instead of fighting Azula, which would certainly have brought about her defeat, he attacked Aang. He and Aang fought evenly, but Azula was outclassed by Katara. Eventually, in the midst of the battle, the two pairs switched, with Zuko now fighting Katara, both using element whips on opposite sides of a river. Azula and Aang charged at each other, but Azula quickly knocked him to the side.

Back in the Palace, Ty Lee was trying to teach Bosco the bear how to walk on his front legs, but she soon was trapped by Toph. Toph and Sokka took a fighting stance against Mai, who in her nonchalance said to take the bear, and the King reunited happily with his pet.

Underground, Katara fought both Azula and Zuko, before Aang managed to get back up from being thrown earlier. He attempted to advance towards Azula and Zuko but was stopped by the Dai Li. They were soon joined by dozens of Dai Li agents, and Katara assumed the octopus stance. Horribly outmatched, Aang realized there was no other choice and created a crystal shelter, attempting to enter the Avatar State. He nearly succeeded, but as he arose into the air, Azula shot him in the back with lightning. Katara stopped him from falling to his death. Iroh suddenly appeared, told the two to escape, and stated that he would hold the enemy off. Once they escaped, Iroh surrendered himself to the Dai Li.

Team Avatar successfully escaped from Ba Sing Se, and Aang was revived with Katara's spirit water. However, as the Earth King sadly stated, "The Earth Kingdom, has fallen."

Aftermath


Azula's successful coup in Ba Sing Se had significant repercussions for the rest of the Earth Kingdom, which was severely weakened by the loss of their last great stronghold. The Earth Kingdom military in particular was damaged, as their leadership, the Council of Five, was arrested. The victory was so complete that Katara remarked later that "the Fire Nation pretty much won the War when they took Ba Sing Se".

With the fall of the Earth Kingdom, the Water Tribe became the last of the four nations yet to be conquered by the Fire Nation. However, given the losses they suffered during the War and their small army, they alone could not hope to defeat the Fire Nation.

The coup also dealt severe damage on a strategic level to the plan to invade the Fire Nation. It reduced the number of troops available to carry out the operation. Hakoda, under the direction of his son, was only able to gather a small "rag-tag" force for the invasion.

After Avatar Aang was defeated in the battle, much of the world believed him to be dead and many lost hope that the War could be won. Aang himself remained unconscious for weeks afterward and the lightning blast disabled his ability to enter the powerful Avatar State. The only advantage gained from this defeat was that the Fire Nation would not expect his intervention during the aforementioned invasion.

During the time that Aang was recovering, the Dai Li, using earthbending, brought down the great walls of Ba Sing Se and the Fire Nation invaded soon after, signifying that the Earth Kingdom had fallen.

Zuko was then able to return to the Fire Nation, and was honored by his father and his people. However, he began to regret betraying his uncle almost immediately.