United Nations Security Council Resolution 1590, adopted unanimously on 24 March 2005, after recalling resolutions 1547 (2004), 1556 (2004), 1564 (2004), 1574 (2004), 1585 (2005) and 1588 (2005) on the situation in Sudan, the Council established the United Nations Mission in Sudan (UNMIS) for an initial period of six months.

The United Nations Mission in the Sudan (UNMIS) was established by the UN Security Council under Resolution 1590 of 24 March 2005, in response to the signing of the Comprehensive Peace Agreement between the government of the Sudan and the Sudan People's Liberation Movement on January 9, 2005, in Sudan.