After the defeat of Japan during World War II, Taiwan was surrendered to the Allies, with ROC troops accepting the surrender of the Japanese garrison. The government of the ROC proclaimed the "retrocession" of Taiwan to the Republic of China and established a provincial government on the island. The military administration of the ROC extended over Taiwan, which led to widespread unrest and increasing tensions between local Taiwanese and mainlanders. The shooting of a civilian on 28 February 1947 triggered an island-wide unrest, which was brutally suppressed with military force in what is now known as the February 28 Incident. Mainstream estimates of casualties range from 18,000 to 30,000, mainly Taiwanese elites. The 28 February Incident has had far-reaching effects on subsequent Taiwanese history.