In Sudan, internal conflict between the government and rebel groups in the southern part of the country lasted for more than 20 years from the 1980s, finally ending with the signing of a peace agreement in January 2005. Soon thereafter, in March 2005, the United Nations decided to establish the United Nations Mission in Sudan (UNMIS). However, ignited by disputes over water and pastoral land between Arab nomads and African farmers, armed conflict started again between the government and rebel groups in Darfur. Continued attacks against African residents by Arab militiamen (the Janjaweed) have led to huge numbers of refugees and internally displaced persons (IDPs). The Office of the United Nations High Commissioner for Refugees (UNHCR) and other agencies have continued providing relief supplies on the ground.