When the Addis Ababa Agreement fell apart in 1983, marking the beginning of the Second Sudanese Civil War, the Sudan People's Liberation Movement/Army (SPLM/A) was founded. Competition between Anyanya II and the SPLM/A led to the eventual defeat of Anyanya II. Some of its members were incorporated into the ranks of the SPLM/A, and others were consolidated into a militia supported by the government of Sudan.[1][2] Those who did not join either came to form, along with tribal militias that emerged in response to the lawlessness of some SPLM/A units, the South Sudan Defense Forces.[3]