The Škoda company, established in Plzeň in 1859, has been an important element of Austro-Hungarian, Czechoslovak and Czech engineering, and one of the biggest European arms factories. During the Communist era (1948–1989) the company's production had been directed to the needs of the Eastern Bloc. Disarray in the era after the Velvet Revolution, and unsuccessful efforts to gain new Western markets, resulted in sales problems and debts. After a huge restructuring process, the company was divided into several subsidiaries, which were later sold. The most important successors companies are Škoda Transportation and Doosan Škoda Power.