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Colonization and and early strife
Earth's national governments had established joint efforts to colonize the moons, along with several other bodies in the Sol system, by 2080. In the mid-22nd century, before the formation of the UNSC, unrest began brewing on the moons as various Unified German Republic corporations based there became targets for attacks perpetrated by neo-communist Koslovics. As a result of an increasing anti-Koslovic sentiment, a resurgent fascist movement known as the Frieden arose on the Jovian Moons. Supported by Unified German Republic corporations, the Frieden opposed both the Koslovics and the United Nations' influence, seeking to achieve peace by destroying the "oppressors on Terra Firma".
In 2160, the Frieden attacked the UN Colonial Advisers on Io, sparking a three-month conflict known as the Jovian Moons Campaign, followed by more conflicts across the Sol system, including the Rain Forest Wars, a series of clashes of Mars, and the Interplanetary War. The Frieden and the Koslovics were eventually defeated, and the moons were transferred to the control of the United Nations.
Moments before the Battle of Earth during the Human-Covenant War, the Prophet of Regret's Fleet of Sacred Consecration was detected near Io by Io Station. Numerous habitats in the Jovian Moons survived the Covenant assault largely unscathed. Europa, specifically, did not suffer when the Covenant attacked.
After the New Phoenix Incident in July 2557, the former captain of the UNSC Infinity, Andrew Del Rio, utilized his connections and accumulated favors to begin an obscure, though rewarding, political career on one of the Jovian moons and eventually replaced a deceased senator of the Unified Earth Government Senate.
"Jovian" is the adjective form of "Jove", who was the god representing Jupiter in the sky.
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