Complex sentence: Firstar was founded in 1853 in Milwaukee, Wisconsin, as Farmer's and Millers Bank, becoming First Wisconsin National Bank in 1919 after as a result of internal evolution as well as mergers.
Split into simpler sentences: Firstar was founded in 1853 in Milwaukee, Wisconsin, as Farmer's and Millers Bank. It became First Wisconsin National Bank in 1919 as a result of internal evolution as well as mergers.