In the prewar world, Union City was a small desert town facilitating the Trucking industry along Interstate 15. Before the Great War, the town and all other properties in the Pass were bought by Athens-Tec to furnish the company's workers. For unknown reasons, an inedible, highly explosive genetically modified form of corn designed for high-yield ethanol was grown in the surrounding farmland, and survived the Great War.
Despite being close to several US military Missile Bases, Union City escaped the devastation that destroyed Los Angeles and San Bernadino proper relatively unscathed, but was still victim to the lethal radiation and airborne FEV-II that ravaged California. Like much of the Cajon Pass the soil was unable to support crops, and the town became just another abandoned ghost town littering the desert.
As the Survivalist Raiders expanded out into the Pass, they reoccupied Union City and used it as a slave settlement, growing the Mutant corn, but quickly realized its relative uselessness and only used it for crude explosives.
As hostilities grew between the Cajon Pass and Survivalists, the NCR, spurred by Corporate interests in the GMO corn as a cheap source of fuel, took over Union City and converted it into a Frontier outposts and military strongpoint, repairing the town's power and water infrastructure and fortifying it with a Sandcrete wall. NCR sharecroppers moved in to grow the GMO Corn, but despite the NCR's efforts to further modify it it proved useless as cheap source of ethanol.
Union City is a large, well-fortified NCR town composed of primarily Sandcrete dwellings and a handful of restored or re-utilized prewar structures. The town forms the Eastern boundary of the worldmap, stretching out both North and South, bounded by large Ethanol Fields on the North and a ruined Prewar Missile Base to the South.
From the main gate the road leads west -to o the immediate south of the main gate can be found NCR military barracks and medical tents, as well as the Union City clinic. To the North is the Town gallows. Going west is the main drag, with the Shi Bank, Mojave Express, and Gun Runners vendor on the northern side and the Bar on the southern Side. The road intersects with another leading North-South, with numerous Sandcrete NCR homes lining the side. Going further west heads up the hill to the NCR Territorial HQ. This road passes by a large Prewar truck refueling station on the east side and Molly's Bar on the West side before ending at a few ruined homes. Going North it passes through numerous NCR homes before passing the El Rey Motel and continuing north to the Ethanol Fields. Doc Marius' "Fortress of Solitude" at Radian-Helix Media lies in the middle of the Fields. To the east of Union City, at the base of the mountains, a large train track and adjoining station run North to South.