What is the name of the army that Magneto forms in "X-Men: The Last Stand"?

In X-Men: The Last Stand, Magneto forms the Brotherhood to oppose the mutant “cure.” The group is commonly called the Brotherhood of Mutants, or simply the Brotherhood.

Magneto sees the treatment developed by Worthington Labs as a threat to mutant survival, believing that governments could eventually use it to remove mutant abilities by force. He therefore recruits a large force of mutants who reject the cure, including Pyro, Juggernaut, Multiple Man, Callisto, Arclight, Quill, and other members of the Omegas.

The Brotherhood attacks Alcatraz Island, where the cure is being presented, leading to the film’s major confrontation between Magneto’s forces, the X-Men, and human security units. A common mix-up is confusing this group with the Acolytes, another mutant faction associated with Magneto in Marvel comics. The film’s army is an expanded movie version of the Brotherhood, and its roster is much larger than the small team seen in the first X-Men film.