The United Nations Mission in 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 Nairobi, Kenya.

UNMIS tasks are to support the implementation of the Comprehensive Peace Agreement, to perform certain functions relating to humanitarian assistance, protection, promotion of human rights, and to support African Union Mission in Sudan. The mandate of UNMIS ended on 9 July 2011; the UNSC officially ended the mission on 11 July 2011, with a drawdown by 31 August 2011. Equipment and personnel will be transferred to UNISFA and UNMISS.

Its most well-known employee was journalist Lubna al-Hussein, who resigned in order to waive her immunity.

See the Wikipedia article for more information about this mission. Link is at the top of the project.