Weapon X

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Weapon X is a fictional government genetic research facility project appearing in American comic books published by Marvel Comics. They were conducted by Department K, which turned willing and unwilling beings into living weapons to carry out covert missions like assassination or eliminating potential threats to the government. It was similar to human enhancement experiments in the real world, but it captured mutants and did experiments on them to enhance their abilities such as superpowers, turning them into human weapons. They also mutated baseline humans. The Weapon X Project produced Wolverine, Leech, Deadpool, Sabretooth, and Weapon H.

The fictional experiment X, or the brutal adamantium-skeletal bonding process, written by Barry Windsor-Smith in his classic story "Weapon X" (originally published in Marvel Comics Presents #72–84 in 1991), was eventually revealed as part of the "Weapon X Project." Grant Morrison's New X-Men in 2002 further revealed that Weapon X was the tenth of a series of such projects, collectively known as the Weapon Plus Program, and the X in "Weapon X" referred not to the letter X but the Roman numeral for the number 10. The first project, Weapon I, pertained to the Super Soldier Project that created Captain America.