Starting in 1956, the regime gradually began to embark on a long-term assimilation policy towards the Turks, which was routinely pursued with more or less intensity until the end of Communist rule and culminated in two periods of intensive campaigns, each lasting several years. The most wide-ranging and public one, directed against the Turks, took place in 1984–1985 and was officially called "the Revival Process" (a term also used, though more rarely, for the other large campaign, which was organized against the Pomak identity in 1971–1974). One of the main aspects of these campaigns was the forced name-changing episodes of the country's Muslim population, in addition to efforts to obliterate traditional clothing, prohibit Muslim customs and deny the use of Turkish language. Apart from these violent episodes, the long-term policy was expressed in various other facts: for example, Turkish-language publications were closed down one by one, and by 1981 only a single newspaper ("Yeni Işık ") survived, until it ceased to be published in 1985. Significantly, the new "Zhivkov constitution" of 1971 replaced the term "national minorities" with "nationals of non-Bulgarian origin".