As Clint Barton made the decision not to eliminate Natasha Romanoff, she was recruited for S.H.I.E.L.D., the two were recruited into the STRIKE unit, codenamed STRIKE: Team Delta. They would then proceed to go on a mission to Abidjan, Ivory Coast called the Abidjan Operation, as well as various other missions, including at least another to Budapest, Hungary. Throughout their S.H.I.E.L.D. career, Barton and Romanoff never needed an extraction plan.
As of 2012, due to an invasion orchestrated by Loki, Fury's initiated the Avengers Initiative, of which included the two S.H.I.E.L.D. After Romanoff helped Barton break free from his control from Loki, the two joined the Avengers in saving the world. From that point on, the two would be a part of the Avengers, as well as continuing their work as S.H.I.E.L.D. agents, until its demise, ultimately ended the STRIKE team.
- Despite most other STRIKE agents being undercover HYDRA operatives inside S.H.I.E.L.D., Black Widow and Hawkeye were notable exceptions to this.