The Tuchanka State Union was formed in 2230 by Urdnot Legacy. Legacy, the son of Urdnot Grunt, planned to build the krogan up to a place of near-unlimited power. He continued Urdnot Wrex's campaign to create new varren and vegetation farms, create new hospitals, and rebuild the infrastructure of the crumbling world. Legacy's achievement of creating Urdnot City was what many believed to be his crowning achievement and the amount of support he had tripled. He won the entire krogan civilization over in a matter of years and, as Tuchanka became a habitable place again, shifted his attention to what he really wanted.