The 2,262 km boundary between Mali and Mauritania mostly follows straight lines and watercourses, connecting the tripoint with Senegal in the west with the tripoint with Algeria in the east. The border was established by the French during the colonial era. Mali and Mauritania signed a border agreement in 1963, and it has not changed since. There are no disputes over the border, but it has yet to be demarcated, and there are several discrepancies concerning how the border is described in the relevant agreements and how it is portrayed on maps. These discrepancies are largely due to vague border documents, particularly from the colonial period.