Mystique (Raven Darkholme) is a fictional character appearing in American comic books published by Marvel Comics, commonly in association with the X-Men. Created by artist David Cockrum and writer Chris Claremont, she first appeared in the comic book Ms. Marvel #16, published in 1978. Mystique is a member of a subspecies of humanity known as mutants, who are born with superhuman abilities. Mystique is a shapeshifter who can mimic the appearance and voice of any person with exquisite precision, and her natural appearance includes blue skin and yellow eyes.

Anti-mutant sentiment rises and the federal government launches its own covert anti-mutant program, Project Wideawake. Believing that the times have become too dangerous for the Brotherhood of Evil Mutants to continue, Mystique goes to Doctor Valerie Cooper, special assistant to the head of the National Security Council, and offers the Brotherhood's services to the government. In return for entering government service, Mystique and her team receive a presidential pardon for all criminal charges, to be revoked if any member of Freedom Force is found committing a crime. Cooper agrees to convey the offer to the President on the condition that the Brotherhood arrests their founder, Magneto. The Brotherhood, now reincarnated as Freedom Force, are defeated by Magneto and the X-Men. When Magneto learns that Freedom Force are official federal agents, he voluntarily surrenders to them.  Mystique leads Freedom Force in capturing the Avengers on behalf of the federal government. She clashes with X-Factor in seeking to arrest Rusty Collins. With Freedom Force, she fights the X-Men in Dallas, and witnesses her foster daughter's apparent demise. With Freedom Force, she battles Cyclops and Marvel Girl. With Freedom Force she seeks to arrest Rusty Collins again, and battles the New Mutants. She finally succeeds in capturing Collins as well as Skids. She leads Freedom Force against the Reavers on Muir Island. On this particularly disastrous mission, Freedom Force loses two of its members, Stonewall and Mystique's lover Destiny. The death of her lover leaves Mystique psychologically scarred.  Mystique is later nearly killed by Dr. Valerie Cooper, who is under the Shadow King's mental control. She then impersonates Dr. Valerie Cooper. Mystique is eventually discovered impersonating Dr. Cooper, and saves Xavier's life by killing the Shadow King's human host, Jacob Reisz. She finally reconciles with Rogue. In time, she comes to terms with Destiny's death. She teams with Spiral and Wolverine in thwarting Mojo's near-destruction of the universe. Mystique later briefly stays as a guest at Xavier's mansion. She begins going insane, and leaves the mansion under the care of Forge.

Using a quote from the above article, answer the following question: When was the freedom force formed?