Mauritania–Senegal Border War

Mauritania–Senegal Border War
	; NASA image of the Senegal River valley: Mauritania is located to the north and Senegal is located to south.
Date	9 April 1989 – 18 July 1991; (2 years, 3 months, 1 week and 2 days)
Location	West Africa; Mauritania-Senegal border
Result	Mauritania and Senegal agree to reopen the border and end skirmishes.
Belligerents
Senegal; FLAM	Mauritania; Supported by:; Syria; Iraq
Commanders and leaders
Abdou Diouf	Maaouya Ould Sid'Ahmed Taya
Strength
10,000	10,000
Casualties and losses
Hundreds dead	Hundreds dead
	250,000 displaced

The Mauritania–Senegal Border War was a conflict fought between the West African countries of Mauritania and Senegal along their shared border from 1989 to 1991. The conflict began around disputes over the two countries' River Senegal border and grazing rights. The conflict resulted in the rupture of diplomatic relations between the two countries for several years, the creation of thousands of refugees from both sides, as well as having a significant impact on domestic Senegalese politics.

Ethnic tension, political/economic crises in Senegal, and competition for natural resources between the two nations were the main underlying causes of this conflict.