all-around independent suspension was developed under the leadership of chief engineer Vladimír Matouš and modelled on the one first introduced by Hans Ledwinka in Tatra. First used on model Škoda 420 Standard in 1933, it aimed at solving insufficient torsional stiffness of the ladder frame. The new design of chassis became the basis for models Popular (845–1,089 cc), Rapid (1,165–1,766 cc), Favorit (1,802–2,091 cc), and Superb (2,492–3,991 cc). While in 1933 Škoda had a 14% share of the Czechoslovak car market and occupied third place behind Praga and Tatra, the new line made it a market leader by 1936, with a 39% share in 1938. World War II During the occupation of Czechoslovakia in World War II, the Škoda Works were turned into part of the Reichswerke Hermann Göring serving the Nazi German war effort by producing components for military terrain vehicles, military planes, other weapons components and cartridge cases. Vehicle output decreased from 7,052 in 1939 to 683 in 1944, of which only 35 were passenger cars. Between January and May 1945, 316 trucks were produced. The UK and US air forces bombed the Škoda works repeatedly between 1940 and 1945. The final massive air raid took place on 25 April 1945, and resulted in the almost complete destruction of the Škoda armament works and about 1,000 dead or injured. Post World War II When, by July 1945, the Mladá Boleslav factory had been reconstructed, production of Škoda's first post-World War II car, the 1101 series, began. It was essentially an updated version of the pre-World War II Škoda Popular. In the autumn of 1948, Škoda (along with all other large manufacturers) became part of the communist planned economy, which meant it was separated from the parent company, Škoda Works. In spite of unfavourable political conditions and losing contact with technical development in noncommunist countries, Škoda retained a good reputation until the 1960s, producing models such as the Škoda 440 Spartak, 445 Octavia, Felicia, and Škoda 1000 MB. In late 1959, the Škoda Felicia, a compact four-cylinder convertible coupe, was imported into the United States for model year 1960. Its retail price was around US$2,700, for which one could purchase a V8 domestic car that was larger, more comfortable, and had more luxury and convenience features (gasoline retailed for less than 30 cents per US gallon, so fuel economy was not of primary importance in the United States at