In the 1920s, after Ukraine became a part of the Soviet Union, the Ukrainian language saw a revival under the Soviet policy of "korenizatsiya" (nativisation), which supported the development of non-Russian languages. The purpose was to gain the support of those ethnic groups that had been oppressed by the Tsarist regime. Soviet government business in Ukraine was conducted in the Ukrainian language, with the aim of integrating the Ukrainian people into the new Soviet system. This Ukrainianisation brought with it a significant advance in the development, standardisation, and codification of the Ukrainian language. Accompanying it was an increase in the number of Ukrainian-language publications, as well as theatre productions and schools in which Ukrainian was used.