Despite putting up a good fight, Hawkeye and most of their team were eventually defeated and then briefly imprisoned at the Raft under the orders of Thaddeus Ross, only to be freed by Rogers and Barton returned back to retirement and after striking a deal with Ross was placed under house arrest as the strain of being a vigilante affected him and his family. Barton acknowledged Thor of his first encounter of him, seeing him fail to lift the hammer.
Feeling he owed a debt to Rogers and Maximoff which he intended to repay, Hawkeye then joined in the Clash of the Avengers, fighting against Iron Man who was in support of the Accords. As they sat around and drank, Barton voiced disbelief that Mjølnir could only be lifted by Thor; Thor then challenged Barton to lift his hammer, where everyone joked at him about lifting it.
Crater Investigation Site where he met up with Coulson. Barton requested if he should slow Thor down, but Coulson wanted to see what Thor would do. As it downloaded, Barton watched Fury's evaluation of candidates Captain America and Hulk until he was apprehended by Black Widow. As Hawkeye continued to fight the Chitauri, he found that he has almost exhausted his supply of arrows. Hawkeye rode in the back of a jeep being driven by Natasha Romanoff, firing arrows as they went while Iron Man and Thor flew alongside and Captain America commanded the mission while riding a weaponized motorcycle.
Barton then claimed a vantage point suspended from a crane and watched from above as Thor knocked out more and more guards. Airbase in Roswell to oversee the transport of the Destroyer to the S. Barton knocked out one of agents and gained access into the room where he began the download. This ultimately ended the test, as Fury stepped in the address and review the S. As the battle became more intense, The Avengers found themselves starting to become overpowered by Loki's forces. Hawkeye joined the other Avengers in an assault against Baron Wolfgang von Strucker's HYDRA base.
D., where he worked under the supervision of Phil Coulson. However, following the Attack on the Helicarrier, he was freed from Loki's mental control by Black Widow and joined the Avengers to fight against Loki's alien army in the Battle of New York, ending the Chitauri Invasion before Barton returned to his work as an agent of S. Barton watched as Ultron claimed that he had been created by Tony Stark to bring about peace, but he believed that the only way to achieve peace was with the extinction of the Avengers, as he viewed them as destructive and a danger to the world.
Assigned by Director Nick Fury to watch over the Tesseract, he was brainwashed by Loki and used as a pawn for his evil schemes. The party was interrupted when a piercing screech rang through the room and a broken down and seemingly malfunctioning Iron Legion robot calling itself Ultron appeared.
Romanoff was seen as Barton's counterpart and the relationship between the two developed into a lasting partnership. Barton drove to New Mexico, listening to Hit Me with Your Best Shot, when he stopped at a gas station which had recently encountered an attempted robbery. Barton returned to the compound and observed as Coulson interrogated Thor. Hawkeye, along with some other agents found the defeated Destroyer and reported it to Coulson and joked about if he wanted to lift it. He shot the arrow onto the building and swung into a window to get away. Hawkeye attempted to reload and fire again but the attacker then threw Hawkeye through the air before revealing himself to be an enhanced man named Pietro Maximoff, who taunted Hawkeye before dashing off into the distance.
Barton would discover her true name, Natasha Romanoff and the two would work closely. Fury then informed Barton that they need some extra muscle at a possible alien crash site, which immediately gained Barton's interest and he was deployed to New Mexico. Soon after his deployment, an intruder broke into the S. As Barton continued to watch from above, he noticed a woman fleeing the compound into a car. When Hawkeye arrived at the town, he witnessed Thor battling the Destroyer, causing him to be amazed in the obscurity of what he was witnessing. The download eventually finished and Barton made his move to escape the S. He took his last arrow that was in a dead Chitauri, put it in his quiver and turned it into a grapple, and jumped off the building just as it was destroyed by the Chitauri. Silently sneaking through the battlefield, Hawkeye took position behind a tree and attempted to destroy another HYDRA bunker with an explosive arrow, but the arrow was strangely intercepted by an incredibly fast moving opponent.
As Barton and Fury drove to the facility, Barton questioned Fury on not choosing Romanoff who was on a deep cover mission in Asia at the time, plus Fury knew not to isolate her in a bunker full of men. As Fury left, Selvig asked Barton about his presence during the Battle of Puente Antiguo as he remembered him, not knowing that Loki was manipulating him. They managed to get into a jeep and were chased by Hill until she became trapped under rubble when the facility imploded. When Selvig mocked the choice of hide-out, Barton explained that it was the most secure base they could acquire. to help to steal a store of iridium needed to stabilize the Tesseract. Hawkeye also informed Iron Man that Thor was taking a squadron on sixth to which Stark joked that he was disappointed that he was not also invited. Barton then consulted Fury about his evaluations on the "would-be Avengers" questioning the accountability of the team, to which Fury responding that they need to count on these people. When Fury asked him if he believed that the Tesseract had been tampered with, Barton responded by saying that if there was tampering, it was not this end of the Tesseract, as he viewed the Tesseract as a doorway from space which could be opened from the other end. Barton helped Loki steal the Tesseract and escape from the base towards S. Barton commanded various other mind-controlled mercenaries and workers, and helping collect the materials that Dr. Selvig asked Barton were he found all of the workers which he informed Selvig that S. Loki questioned why Barton had failed to kill Fury, asking if it was because he admired him, but Barton argued he was disorientated and not at his best with a gun. While Captain America fought a Chitauri Soldier, Hawkeye informed him that a lot of civilians were being cornered in a bank ready to be executed to which Captain America told Hawkeye that he was on it and went to rescue the civilians single handedly from the alien attackers. Fury first spoke to Erik Selvig and demanded a report about the Tesseract's energy levels before he spoke to Barton about his views on the situation, asking for a briefing on the team, Barton expressed his belief that Selvig and his team were not a threat to them. Loki ordered Barton to shoot Fury before they departed. He then acted as Loki's commander at his safe house, which Barton personally selected due to protective defenses. Loki demanded to know everything about them, vowing to test them so he could rule the Earth. Hawkeye dodged a blast and then fired an arrow at a Chitauri soldier flying on a chariot at a far distance that crashed into a Leviathan. Hawkeye destroyed an engine with an accurately placed explosive arrow and boarded the Helicarrier with a team of Loki's soldiers with their task to destroy the Avengers by unleashing the Hulk and freeing Loki so they could complete their plan to use the Tesseract to bring about the War on Earth. The two old friends had a prolonged fight using Hawkeye's bow and arrows, knives, and, when the fight got dirtier – with teeth. The Avengers all stood together in a circle as they overlooked the city overrun with Chitauri soldiers. Helicarrier, using a stolen Quinjet to covertly approach the Helicarrier. As he continued to make his way through the Helicarrier, Barton was confronted by Natasha Romanoff; who snuck up behind him in an attempt to disarm him. Hawkeye took cover behind a car to protect himself from the destruction.