Captain America: The First Avenger directing the project before Johnston was approached in 2008. The principal characters were cast between March and June 2010. Production of "Captain America: The First Avenger" began in June 2010, and filming took place in London, Manchester, Caerwent, and Liverpool in the United Kingdom, and Los Angeles in the United States. The film was converted to 3D in post-production. "Captain America: The First Avenger" premiered in Hollywood on July 19, 2011, and was released in the United States on July 22, 2011. The film was commercially successful, grossing over $370 million worldwide. Critics particularly praised Evans' performance, the film's depiction
Captain America: The First Avenger team of that name, and in November Johnston refuted speculation that the Sub-Mariner, an Invaders team-member in the comics, would be included. Johnston later explained that "the Invaders" had been discussed simply as a possible name for the squad of commandos Captain America leads in the film. Christopher Markus, one of the screenwriters, said the unnamed group was "called the Howling Commandos in the script, but no one says that out loud." The design as a whole tried to create technology that could be built in the 1940s, though with the added Cube technology in Hydra's case. Abandoned Nazi projects