Katharon

Kataron (カタロン) is an anti-Federation resistance group formed after their involvement in countless increase of cases such as suppression, inhuman tactics and exterminations had increased with A-Laws. Consisting of former members, scientists, workers, and soldiers of the three major powers such as the Union, Human Reform League, and AEU, they use older model mobile suits against the A-Laws and have secretly gained support from people outside the organization.

History
After learning that Celestial Being's reappeared to fight the A-Laws, members of Kataron tried to forge an alliance with them, but they are refused. One of their contacts is Lyle Dylandy, the second Lockon Stratos, who provided them with information on Celestial Being's attack on a prison, in which Kataron members freed the prisoners.

Earlier in the series, their meteor base is destroyed by an A-LAW detachment. Later on, their Middle Eastern base is overrun by the A-LAWs deploying automaton robots to massacre Kataron members.