World Investigation Agency (Earth-19999)

"The WIA was formed to fight the battles the military couldn't alone. And after today's events, I'm sure we are the only ones capable to defend our planet from all kinds of treats."

- - Guile

The World Investigation Agency, often abbreviated WIA was initially formed in the United States of America as the United States Special Forces and Intelligence Agency with the goal of stopping international crime gangs, in particular the Mishima Zaibatsu, Shadaloo, S.I.N., the Red Dragon and Black Dragon clans. By the time of Mortal Fighter: Ragnarök, the organization has become the Earthrealm Investigation Agency; while it was still an anti-crime organization, it's mandate had expanded to defending all of Earthrealm against outerdimensional invasions, such as by Outworld.

History
The WIA partly supplanted the role of the United States Special Forces in the world before Shao Kahn's failed invasion of Earth and the subsequent destruction of the Black Dragon crime cartel. Though the organization is focused on armed and espionage tactics to destroy their enemies, in truth, it became exploratory in nature.

In the events leading up to Mortal Fighter III, Chun-Li, Jax and Guile attempted to warn their government about the impending Outworld threat, but their words fell on deaf ears. Shao Kahn's invasion of Earthrealm began uncontested, and he claimed almost every soul on Earth for his own. Guile, Jax and Sonya were among a few survivors whose souls were protected, selected by the Elder Gods to fight for their world's freedom. The Earth warriors, led by Lord Raiden and Jin Kazama, were successful. The WIA also keeps track of known portals that lead from and to Earthrealm. To open them, they uses "science, rather than magic", as Jax's ending states in Mortal Fighter III.

After Kahn's defeat, Guile was convinced of the potential threat other worlds could bring and gave them clearance to form the Earthrealm Investigation Agency, whose job it would be to protect Earthrealm from extradimensional threats as well as the growing threat the Shadaloo-Mishima Zaibatsu alliance could create. With time, three particular members of interest were added to their ranks: Siegfried, the former wielder of the Cursed Sword Soul Calibur in order to atone for his "sins", the super soldier kidnapped as a child for experimentation, Raiden, who was trained by Solid Snake from the WIA's strike-team, F.O.X., and the blind swordsman Kenshi, who joined in order to make his hunt for Shang Tsung easier.

The storyline of Mortal Fighter VI reveals that WIA has secret special agents on all know six realms to identify possible threats to Earthrealm. During the events of the game, the WIA met with catastrophe. Juri, a S.I.N. spy (at the orders of Daegon) who had infiltrated the Special Forces, entered the agency's underground bunker and activated miniature nuclear weapons as he escaped, utterly destroying the WIA headquarters, and preventing any further travel to other realms; the Red Dragon felt the WIA to be a threat after its prime purpose had been served: the destruction of the Black Dragon. However, the organization itself was still intact, as they had many other bases spread through realms, many which won against their Red Dragon double agents.

In Mortal Fighter: Ragnarök, Chun-Li and Raven goes after the Mishima Zaibatsu in Cervantes' warship. While Taven is taken in as a hostage, her forces attack the ship. Nina and Cervantes leaves their post to try and combat them, but then pursues Taven. Taven manages to beat him and leaves the ship to Arctika. Chun-Li attempts to get info out of Taven, but he defeats her proceeds on his journey.