Prior to the December 1984 coup that brought Taya to power, the Mauritanian-Moroccan cooperation agency stated that relations between the two countries were on the mend in spite of alleged Moroccan complicity in a 1981 coup attempt and Mauritania's subsequent turn toward Algeria (see Consolidation of Power , ch. 1). Representatives from both sides initiated a series of lowlevel contacts that led to a resumption of diplomatic ties in April 1985. For Mauritania, the détente with Morocco promised to end the threat of Moroccan incursions, and it also removed the threat of Moroccan support for opposition groups formed during the Haidalla presidency. Through the agreement with Mauritania, Morocco sought to tighten its control over the Western Sahara by denying the Polisario one more avenue for infiltrating guerrillas into the disputed territory.

Relations between Morocco and Mauritania continued to improve through 1986, reflecting President Taya's pragmatic, if unstated, view that only a Moroccan victory over the Polisario would end the guerrilla war in the Western Sahara. Taya made his first visit to Morocco in October 1985 (prior to visits to Algeria and Tunisia) in the wake of Moroccan claims that Polisario guerrillas were again traversing Mauritanian territory. The completion of a sixth berm just north of Mauritania's crucial rail link along the border with the Western Sahara, between Nouadhibou and the iron ore mines, complicated relations between Mauritania and Morocco. Polisario guerrillas in mid-1987 had to traverse Mauritanian territory to enter the Western Sahara, a situation that invited Morocco's accusations of Mauritanian complicity. Moreover, any engagements near the sixth berm would threaten to spill over into Mauritania and jeopardize the rail link.

Data as of June 1988