During what North Korea called the "peaceful construction" period before the Korean War, the fundamental task of the economy was to overtake the level of output and efficiency attained toward the end of the Japanese occupation; to restructure and develop a viable economy reoriented toward the communist-bloc countries; and to begin the process of socializing the economy. Nationalization of key industrial enterprises and land reform, both of which were carried out in 1946, laid the groundwork for two successive one-year plans in 1947 and 1948, respectively, and the Two-Year Plan of 1949–50. It was during this period that the piece-rate wage system and the independent accounting system began to be applied and that the commercial network increasingly came under state and cooperative ownership.