In August 1990, a revolution took place in Croatia; it was centred on the predominantly Serb-populated areas of the Dalmatian hinterland around the city of Knin, and in parts of the Lika, Kordun, and Banovina regions, and settlements in eastern Croatia with significant Serb populations. The areas were subsequently named the Republic of Serbian Krajina (RSK). After declaring its intention to integrate with Serbia, the Government of Croatia declared the RSK a rebellion. By March 1991, the conflict escalated into the Croatian War of Independence. In June 1991, Croatia declared its independence as Yugoslavia disintegrated. A three-month moratorium followed, after which the decision came into effect on 8 October. The RSK then initiated a campaign of ethnic cleansing against Croat civilians, and most non-Serbs were expelled by early 1993. By November 1993, fewer than 400 ethnic Croats remained in the UN-protected area known as Sector South, and a further 1,5002,000 remained in Sector North.