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Before 2543, the colony cut off contact with Earth and declared itself as an independent planet and became a known haven for terrorists and outlaws thereafter. The CAA office was destroyed at some point after this possibly due to the growing amount of outlaws and Insurrectionists residing there who began accumulating weapons and equipment with the intent to attack Earth.
By 2553, an unknown number of Kig-Yar, Unggoy and Jiralhanae had settled on the planet. Each former Covenant species had their own compound. While it is unknown how the Brutes and Grunts integrated, the Jackals did with ease, trading with the humans and living side by side with no hostility.
In January, 2553, UNSC Ariadne, a patrol ship, had to drop out of Slipspace due to a technical problem near the planet. The Ariadne requested, and was denied, assistance from Venezia leading to the ship's destruction. During the search for survivors in the debris of Ariadne, a Type-38 Anti-Aircraft Cannon on the surface of Venezia engaged the destroyer UNSC Monte Cassino. Monte Casino evaded the shot and destroyed the defensive weapon with an Archer Missile.
Two months after the destruction of Ariadne, the ODST's Malcolm Geffen and Vasily Beloi of Kilo-Five landed on Venezia to meet Mike Spenser, an ONI informant on the colony. After arriving at Spenser's house in the city of New Tyne, the two ODSTs discovered that the leading Insurrectionist on Venezia was Staffan Sentzke; father of fellow Kilo-Five member Naomi-010.