The Senegalese section of MSA was the Senegalese Party of Socialist Action (PSAS), and it was led by Lamine Guèye.[1] In Guinea, the Socialist Democracy of Guinea was the section of MSA.[3] The Sudanese section of MSA was the Progressive Sudanese Party, while what became the Niger section retained the MSA name as the Mouvement Socialiste Africain-Sawaba.[4]