Avengers Incognito (Earth-42)

The Avengers Incognito  is a secret branch of the S.H.I.E.L.D. organization known as the Avengers. They run out of The Vault; a secret, underground facility hidden underneath the Appalachian Mountains. Incognito is composed of a group of highly trained espionage artists; those with both natural skill and super human abilities. They delve into the shadows to do the "behind-the-scenes" work that the spotlight-followed Avengers can't handle. The majority of the team is composed of a team whose alliances are questionable, however they have proven to be extremely loyal to Nick Fury, and Nick Fury alone. Avengers Incognito is led by Natasha Romanof, otherwise known as the Black Widow. Her second in command is Clint Barton, or the Hawkeye. Surprisingly, Widow was willing to allow two villains to join her team, realizing that they were useful allies and that they were better suited on their side rather than the other.

Base of Operations
Avengers Incognito runs out of a large, underground facility underneath the Appalachian Mountains known as The Vault. The Vault is accessible only by Director Fury and official members of the Incognito squad. Rumors state that The Vault was once a military testing ground for North America on mutants. However, it has sense been transformed into the home of the Incognito members. The Vault is split into many sections, each with unique features. Unmanned sentries guard all three entrances, ready to attack any intruders or potential threats. Not much is known about The Vault, other than that it was create dduring World War II. No one but the members of Incognito and a few select S.H.I.E.L.D. agents. No surveillance footage or photographs have been accquired by the public or any other persons.