The Sahara has linked rather than separated the peoples who inhabit it and has served as an avenue for migration and conquest. Mauritania, lying next to the Atlantic coast at the western edge of the desert, received and assimilated into its complex society many waves of these migrants and conquerors. Berbers moved south to Mauritania beginning in the third century A.D., followed by Arabs in the eighth century, subjugating and assimilating Mauritania's original inhabitants. From the eighth through the fifteenth century, black kingdoms of the western Sudan, such as Ghana, Mali, and Songhai, brought their political culture from the south.

The inability of the Daddah regime to extricate Mauritania from its economic problems and the war led to a military coup d'état in July 1978. During the next six years, the nation was governed by military regimes whose efforts to remain outside the Western Sahara conflict were impeded by the continuing war between Morocco and the Polisario, which spilled over into Mauritania's northern regions. The most durable of the military regimes during that time was led by Mohamed Khouna Ould Haidalla, who assumed power in May 1979. It survived as long as it did because Haidalla skillfully balanced the factions in his government, which included nationalists, adherents of the Western Sahara liberation cause, and proponents of close ties with Morocco. Toward the end of his regime, Haidalla began to arrogate authority at the expense of the other members of the ruling body, the Military Committee for National Salvation. Some of these decisions concerned highly charged political issues, such as the recognition of the Polisario's governing arm, the Sahrawi Arab Democratic Republic. The ruling committee also accused Haidalla of corruption and nepotism and decided finally, in December 1984, to depose him. This act reflected Mauritania's delicate and vulnerable regional position and the necessity for its leaders to maintain a neutral position toward the Western Sahara.