Clint Barton was ridden with guilt after his wife and his three children were all killed during the Snap. In the five years that passed, Barton decided to take up a life of vigilantism, serving justice to those who weren't killed by Thanos. Barton made his way to Mexico to eliminate the Mexican Cartel members who survived the Snap.
Hawkeye arrived at Mexico, continuing his mission to kill all criminals who survived the Snap, targeting the Mexican Cartel. Barton used his superior skills as an assassin to infiltrate their base of operation and began to slaughter all the members ruthlessly and quickly, that the Cartel could not even get the chance to draw their weapons. Barton would then leave a horrendous scene of dead bodies that would be found by the federales, later James Rhodes would share this with Natasha Romanoff who was searching for him.
James Rhodes then reported his findings to Natasha Romanoff, stating that he might not even want to find Clint Barton, scared of who he has become. However, Romanoff asked if he could keep looking for him, which he agreed to. Rhodes would eventually track him down to Tokyo, Japan, where he planned to, and successfully killed all the members of the Yakuza, led by Akihiko.