Author's note: This is my first story in chapters so I hope you don't hate me guys. I just need to let out this crossover so it would stop messing with my mind. This story is a crossover of Avatar: The Last Airbender and Attack on Titan. The 3D maneuver gear of the Attack on Titan and the metal cables seen in the Legend of Korra is just sooo alike, in a way. So I had a crazy idea of letting them meet but of course I had to make some alterations. It is set after the Recon Corps captured the Female Titan.

Please Review.

Chapter one: Dust cloud

The Survey Corps' Special Ops Squad, commonly known as Levi Unit, was all killed while battling the Female Titan. What are left now were the new recruits: Eren, Mikasa and the others.

[Levi]

I was still angry at the Female Titan and myself. I wasn't there to help them. They were my unit. I lived with them in every mission and now they're dead. Eren and the others were also busy. Some were cleaning the stalls and the others were sparring. I was grooming my horse when I heard a horse galloping to our direction. They stopped whatever they're doing and we looked up to see a Recon Corps soldier coming fast towards us. I suddenly felt concern.

'Was it another attack? The soldiers barely recovered!' I thought.

"Captain Levi! Your presence is requested by Commander Erwin. Something is happening within Wall Maria," the soldier reported.

"Attention!" I ordered. They all fell in line with their right hand on their hearts. "Yes, sir!" they responded. "Get your horses ready. Let's go," I took my horse and the others.

We reached the Wall Rose viewing the vast empty ruins of the fallen Wall Maria. Erwin was giving orders to some troops when they reached the place. I noticed that they're all alarmed.

"What's happening, Erwin?" I asked. I noticed concern etched into his face.

Erwin turned around to face us. "Early in the morning the men sighted a dust cloud in the horizon. It's coming towards here and it is being chased by a few Aberrants, all about 30m tall," he informed us.

"Why are they chasing the dust cloud?" Eren wondered loudly.

"Maybe the cloud is leading them here," Armin suggested.

"We still don't know yet but whatever that is, it's coming and its coming fast," Major Hanji piped in from the sideline.

"Levi, stay with here with your men. I need to alert the higher ups with the latest news," Erwin ordered then left with some men.

"Do you think it's another human Titan like Annie?" Major Hanji asked, suddenly.

I looked at the approaching dust cloud. At its pace it will surely reach the Wall Rose before sundown.

Author's note: Toph is somewhat 18 years old here. And Team Zero is composed of master benders aging 17 to 18, though Liu is 20 here. And well, we'll just call the soldiers 'Dai li' since the master benders in Ba Sing Se in the ATLA canon are the Dai li.

[Toph]

"Commander, they're gaining on us!" a terrified injured soldier screamed.

"Oh, make him shut up, Koji. I'm getting irritated by the minute," an annoyed Xing said.

"Ignore him, Xing," Koji replied.

I am Toph Beifong, the Commander of Team Zero. Team Zero is composed of the earthbending students hand-picked and taught by me, to protect Ba Sing Se. Liu, the far sighted bender specializing in scouting. Licht is expert in handling blades. Koji, flirt and always has a cool head. He has a knack at handling critical situations. Xing, the hotheaded but excellent tracker. Sky, the strategist and the only female member aside from me. Lastly, Zen, extremely loyal to me more than anybody else (though I'm not sure if its loyalty or obsession).

Under the pleas of the Middle Court, my team was sent to retrieve the two squads who haven't returned from their missions. We saved seven remaining soldiers, who were still alive, from the forest. The five were fine but the other two were injured. So I ordered the five to earthbend their way out at my signal while my team carries the injured. The five did as I ordered but the plan was trashed, when out of the blue, the 'Abnormals', as we call the abnormal Titans, appeared and attacked us. My team and I were left no choice but to lure the Abnormals while the five escaped.

We are currently traveling on an earth wave to move faster away from the Titans. We tried eliminating them but more kept on appearing.

'Damn these bastards! We're barely getting away,' I thought as I surveyed my surroundings. 'It's been hours since we separated with the surviving soldiers and these massive chompers are still a pain in the ass,' I sensed a high wall reaching 50m ahead of us.

"Dai li!" I yelled within the dust cloud, which was created from the wave of earth we're riding on as a form of transportation.

"Yes, Commander!" they yelled in chorus, their conversation forgotten.

"There's a 50m wall ahead of us. It's destroyed partially and within it are ruins of a human city. We will head there and try to use it to our advantage, get ridding of these massive chompers. Keep your heads up, retards; it's time to chop some Titan ass!" I said then started giving orders. "Liu, scout the surroundings and keep the earth wave from collapsing. Licht support him,"

"Roger that!" Licht and Liu responded.

"Xing, Protect the injured,"

"Roger that!" he responded. "Why do I get to protect these gum-flappers?" he grumbled later on.

"Koji, Zen, take down the nearest chompers on the left,"

"Roger that!" they responded.

"Sky and I will take the right," I finished.

They all tended to their assigned posts. Koji and Zen bent their metal cables to maneuver their way onto the Titans napes while avoiding the sudden movements of their hands. They used their retractable metal blades to slice the chunks of the Titan's weak points in their nape, killing two Titans simultaneously. By the time they took down the remaining Titan, Sky and I had finished off four Titans on the right. All of us landed back on the earth wave and retracted their metal blades before entering the ruined wall.

"Commander, there are six separate Titans on the general direction of the east while two on the west side. There's another Wall ahead of us," Liu informed me.

"Another Wall?" I muttered.

"Yes, Commander. It seems to be in a good shape than the former," Liu replied.

"Hmm," I maximized my seismic sense to see through the Wall. My eyes widened upon realizing that there are lots of people behind the wall. I smirked. "Dai li," I said.

"Yes!" they saluted.

"Prepare to head towards the next wall. There are humans residing there," I stated.

"Humans?" Xing uttered in surprise.

"Yes, humans. I think Ba Sing Se is not the only place for humans," I said. "So, get moving and don't show them your bending yet when we get there since they don't see us bending because of the dust cloud. We're not sure if they know of bending yet. They might attack out of ignorance, get it? "

"Yes, Commander!"

After four hours of traveling on the earth wave, I felt something's not right. I realized that a couple of Aberrants, one about 20m and the other, 30m, are jumping so high like giant chomping frogs after us, the moment I noticed was already too late. The chomping couples crashed to the earth wave that resulted our fall. I somersaulted in the air and landed perfectly on my feet. I immediately checked on the others. 'Team Zero seemed to pull it through…' I thought.

"Ahhh!" a piercing scream came from one of the injured soldiers, as the 20m chomped off one of the soldier's arm.

I snapped to the direction of the scream and inwardly cursed my inability to see. "Kill the Titans and retrieve the survivors fast, before the others our location," I ordered. "If possible, retrieve them alive. You have a minute to execute the order,"

"Roger that,"

Koji and Sky aimed for the 20m Titan's tendons on its heels. Licht maneuvered himself with the metal cables and landed on its neck, cutting the Eotena flesh before the Titan took another bite of the hysterical soldier. Sky caught the soldier before he hit the ground.

Zen and I attacked the other Titan, who was attempting to swallow the other soldier whole, on the arm holding the soldier. Liu caught the injured soldier. Xing attacked the nape but failed to cut the weak spot when the titan went into rampage after having its arm chopped off.

"Damn!" Xing cursed and maneuvered himself to proceed for the next attack. He was close enough when the Titan swung his arm at the last second and, Xing being unable to change course, was hit and went flying towards Liu. They hit on the ground.

"Damn it!" I cursed and made a run for it along with the others to rescue our fallen companions. "Take them!" I ordered the others.

"It's too late," Zen yelled and as if on cue, a Titan's foot stomped on our direction.

I reacted swiftly as I ever been. I catapulted our group, on a huge slab of earth, as far as possible towards the wall. I heard Zen's yell and Sky's scream before I hit a hard surface and got the air knocked out off me then everything went black.

Author's note: I divided the groupings of Ba Sing Se's military in four: the Lower Ring soldiers, the Middle Ring soldiers, the Upper Ring soldiers, and Team Zero (the elite force).

[Eren]

"We've been observing this thing for hours and it's already annoying the hell out of me," Levi eyed the approaching dust cloud with disdain. He stood up from his seat and went to lean on the canyon facing the city. I sat not far from him.

"Captain, we've spotted some humans," a soldier informed.

I shot up on my feet. "Humans?"

"Are you sure?" Levi inquired, standing up. I jogged towards the lookout post

"The dust cloud didn't exactly clear up but we spotted some humans," the soldier replied.

Levi approached the others to borrow the telescope from them. He was just a meter or two from them when there was a loud explosion just few meters from where he stood. A puff of dust covered the thing that fell infront of him. Levi and the others went into stance as they prepared to see what will come from the puff of dust.

"Ahh!" they heard a scream and other voices.

"Commander!"

The puff of dust cleared out and we saw nine people there. One man had his arm torn and bleeding. Two young men (Liu and Koji) about nineteen or seventeen were tending in the bleeding guy and the other injured guy. A chestnut haired woman (Sky) and two guys (Xing and Zen) at the same age as the two other boys tending the wounded. The three wore worried faces while surrounding an unconscious petite figure of a girl with a long black wavy hair.

All of them wore a type of clothing which I don't recognize. They wore green long-sleeved clothing that reached their knees and with brown leather vest over it. A brown belt and light brown loose pants and long leather arm and ankle bands encasing their lower arms and lower legs. They wore green and brown shoes except the unconscious girl.

"Who are you, brats?" Levi's cold voice asked placing his hand on the hilt of his weapon, the others mirrored his action. I stood guard frowning at them.

The team's gaze lifted to the people crowding them. The spiky raven haired boy (Xing) stood up, clenching his fist. "Who wants to know?" he said, abrasively, and glared at us.

"You've got a sharp tongue for a brat," Levi commented, sending a glance at his men. The soldiers drew their blades. The group stood up, except for the chestnut haired girl (Sky) who stayed at the unconscious girl's side (Toph), and surveyed their surroundings, noting their breathing and even the slightest movement signaling attack.

'These are raised fighters,' I observed. 'But how will they fight us if they lack weapons? I doubt it if they'll only use hand-to-hand combat,'

"Now, now everyone can't we talk like civilized beings?" the fairly short, messy haired blond (Koji) suggested with his arms held up.

"What the hell are you talking about, Koji?" Spiky (Xing) snapped. "They're enemy!" he insisted.

"Shut your trap, Xing!" the chestnut haired girl scolded. "Who's fault is it that we're here in the first place, huh?! If you killed that Titan, we will not be in this situation! So just let Koji handle the situation," she said fiercely. Xing shut up and looked away. Levi motioned for the others to relax.

"Wait, you guys were fighting Titans?" I said, unbelieving. "How'd you do it? I mean you don't have any weapons!" I accused.

"Heh. Well, we have weapons. We fought some but by our luck a couple of abnormal ones came swinging on our way. One chomped off that screaming guy's arm but we took it down. Sadly, Xing's cut wasn't deep enough to kill the Titan so our Commander was forced to save our sorry asses once again," he gestured at the unconscious girl.

"She's your Commander?" I asked, incredulously.

"Hey, watch it!" Xing warned at my tone.

"What's up with her?" Levi asked.

"Nothing major. She took the impact from our fall, she's just unconscious," the chestnut haired girl said, sarcastically and spared an angry glare at Spiky.

"I believe we weren't formally introduced," Koji said. "I am Koji Cantrell and these are my teammates, Sky Chlostre," he pointed at the chestnut haired girl. "Licht Chase," he gestured at the quiet guy with long black hair tied in a ponytail. Weirdly enough, he kept his eyes narrowed in slits. "Xing Feng," he gestured at Spiky. "Liu Frost," he gestured at the guy with brown hair and sharp eyes. "Zen Lockhart," gesturing at the slender guy with a fierce expression, reminding me of a tiger ready to pounce on his prey. "These two," he gestured at the two injured soldiers. "…are the survivors from the recent scouting of Lower ring Squad 78 and Middle Ring Squad 88, though each squad was composed of 50 members, only 7 survived," he shrugged. "Now, who are you guys and where are we?"

"You are here in Trost, the southern city of the Wall Rose," Erwin replied, who just came. "We are the Recon Corps guarding this area,"

"Commander Erwin!" the others acknowledged.

"I heard your explanation earlier. So you were fighting off Titans earlier before you went flying into our walls, am I right?" he questioned Koji.

Koji faced him. "Oh, another face. Yes, you're right." He answered. "From what I've heard them call you, you certainly command them. Would you mind lending help? As you can see, we can only administer first aid here," he gestured at the injured men now wrapped in bandages.

Erwin nodded at the statement and the others went to carry the wounded to the medical area. Sky accompanied Toph as Zen carried her to the medical area. The others proceeded to the room in the headquarters. There was only Captain Levi, Commander Erwin, Mikasa, Armin, and I in the room aside from those strangers.

"As I recall, you haven't mentioned anything about the other girl who was unconscious," Erwin said.

I was standing along with Mikasa and Armin in the sideline while Commander Erwin sat across that Koji guy in the table. The others stood behind that Koji guy and Captain Levi leaned on the wall, a meter away from the commander.

"Well, you hardly can call her a girl," Xing mumbled, earning an elbow from Liu.

"She is Commander Toph Beifong, the leader of Team Zero," Koji started to say.

"I see. So she's your commander," Erwin said, though I can almost hear amusement from his voice.

'Well it isn't entirely believable that that unconscious girl is their commander. I mean, she's way too frail, but well, looks could be deceiving,' Eren thought.

"Yes," Koji replied. "We don't know much about her though, you see, she's not actually a people person. She hates crowds," he said. "All we know of her background is she was fighting in the underground fights since she was about 7 years old then the Titans attacked she joined the military at the age of 12 and she's amazing in the battlefield," he finished. "Does that satisfy your curiosity?"

My mouth gaped for a minute then I suddenly felt sorry for her. 'I mean she joined the military at the age of 12? Who does that? Maybe she's like me who saw enough of battle and death.'

"Well, it satisfied me enough but I still have to report to the higher ups to see what they will decide," Erwin said and stood up.

"What? So we're prisoners now?" Xing yelled, surprise in his face then anger.

"Xing, settle down," Koji warned but the guy seemed to not to notice.

"No! They can't judge us! We aren't prisoners here. I mean, why do they even do that? We aren't their people. We're not chained to their laws!" he yelled, stepping up.

'Man, I thought. 'This guy is really freaked but I understand the feeling but we can't risk the fact that they might be like me and Annie, human-Titans,'

I saw Captain Levi going on his guard getting ready to subdue the guy when something unexpected happened. The slit eyed guy (Licht) hit Xing on the nape which surprised us except for them of course.

"Well, sorry about that. Xing isn't all gung ho in being imprisoned but then we invaded your place," slit eyes (Licht) spoke for the first time and carried Xing like a sack of rice then waited for Koji to stand.

"We will comply in being jailed but just so you know, it ends if you try something," Koji sent a warning glance at us and Erwin called the attention of two soldiers to escort them to the cells.