After the war, Turkey continued to support major United States initiatives in the region, including the creation of a safe zone for Iraqi Kurds over northern Iraq. Turkey received heavy Iraqi Kurdish refugees following the 1991 uprisings in Iraq (1 March – 5 April 1991). The Iraqi no-fly zones were two no-fly zones (NFZs) that were proclaimed by the United States, United Kingdom, and France to create safe zones for the internally displaced people after the war. The US and UK claimed authorization for the NFZ based on United Nations Security Council Resolution 688, though not in the text. The US stated that the NFZs were intended to protect the ethnic Kurdish minority in northern Iraq and Shiite Muslims in the south. Turkey opened its Incirlik and Diyarbakir air bases and became involved in the ground support and intelligence operations for the northern NFZ which was initially part of Operation Provide Comfort's relief operations before being succeeded by Operation Northern Watch.