Frieden

From Halopedia, the Halo wiki

Summary

In 2160, before the formation of the UNSC, the Frieden, a resurgent fascist movement springing from anti-Koslovic sentiment in the Jovian Moons was formed to achieve peace by destroying the "oppressors on Terra Firma" and it attacked the U.N. Colonial Advisors on the moon, sparking the Jovian Moons Campaign, the Rain Forest Wars, a series of clashes of Mars, and the Interplanetary War. Both the Frieden and the Koslovics were defeated.