Complex sentence: Subsequent to the 1999 Kosovo War, when the factory was bombed and nearly completely destroyed, the factory was purchased in 2008 by FIAT and was renamed Fiat Automobili Srbija (Fiat Automobiles Serbia, FAS).
Split into simpler sentences: Subsequent to the 1999 Kosovo War, when the factory was bombed and nearly completely destroyed, the factory in 2008 became a subsidiary of Fiat. Once fully purchased by FIAT, the concern was renamed Fiat Automobili Srbija (Fiat Automobiles Serbia, FAS).