 Complete the following phrase:  The SPLM as a rebel movement was formed on 16 May 1983, after the Sudan governments abandonment of the Addis Ababa agreement signed between the Gaafar Nimeiry government and the Anyanya leader Joseph Lagu, who had first introduced the Southern Sudanese to the effective political, economic, social, educational, and religious situations they would face after Sudans independence. The movement published a manifesto setting out its positions and attracted a group of rebellious south Sudanese soldiers of the Sudanese Army based in Bor, Pochalla, and Ayod first called the Bor Mutiny. These joined remts of the Anyanya rebels of the 