Almoravid dynasty
Southern Almoravids and the Ghana Empire

After leaving Yusuf Ibn Tashfin in the north and returning south, Abu Bakr Ibn Umar reportedly made Azuggi his base. The town acted as the capital of the southern Almoravids under him and his successors. Despite the importance of the Saharan trade routes to the Almoravids, the history of the southern wing of the empire is not well documented in Arabic historical sources and is often neglected in histories of the Maghreb and al-Andalus. This has also encouraged a division in modern studies about the Almoravids, with archeology playing a greater role in the study of the southern wing, in the absence of more textual sources. The exact nature and impact of the Almoravid presence in the Sahel is a strongly debated topic among Africanists.

According to Arab tradition, the Almoravids under Abu Bakr's leadership conquered the Ghana Empire, founded by the Soninke, sometime around 1076–77. An example of this tradition is the record of historian Ibn Khaldun, who cited Shaykh Uthman, the faqih of Ghana, writing in 1394. According to this source, the Almoravids weakened Ghana and collected tribute from the Sudan, to the extent that the authority of the rulers of Ghana dwindled away, and they were subjugated and absorbed by the Sosso, a neighboring people of the Sudan. Traditions in Mali related that the Sosso attacked and took over Mali as well, and the ruler of the Sosso, Sumaouro Kanté, took over the land.

However, criticism from Conrad and Fisher (1982) argued that the notion of any Almoravid military conquest at its core is merely perpetuated folklore, derived from a misinterpretation or naive reliance on Arabic sources. According to Professor Timothy Insoll, the archaeology of ancient Ghana simply does not show the signs of rapid change and destruction that would be associated with any Almoravid-era military conquests.

Dierke Lange agreed with the original military incursion theory but argues that this doesn't preclude Almoravid political agitation, claiming that the main factor of the demise of the Ghana Empire owed much to the latter. According to Lange, Almoravid religious influence was gradual, rather than the result of military action; there the Almoravids gained power by marrying among the nation's nobility. Lange attributes the decline of ancient Ghana to numerous unrelated factors, one of which is likely attributable to internal dynastic struggles instigated by Almoravid influence and Islamic pressures, but devoid of military conquest.

This interpretation of events has been disputed by later scholars like Sheryl L. Burkhalter, who argued that, whatever the nature of the "conquest" in the south of the Sahara, the influence and success of the Almoravid movement in securing west African gold and circulating it widely necessitated a high degree of political control.

The Arab geographer Ibn Shihab al-Zuhri wrote that the Almoravids ended Ibadi Islam in Tadmekka in 1084 and that Abu Bakr "arrived at the mountain of gold" in the deep south. Abu Bakr finally died in Tagant in November 1087 following an injury in battle—according to oral tradition, from an arrow —while fighting in the historic region of the Sudan.

After the death of Abu Bakr (1087), the confederation of Berber tribes in the Sahara was divided between the descendants of Abu Bakr and his brother Yahya, and would have lost control of Ghana. Sheryl Burkhalter suggests that Abu Bakr's son Yahya was the leader of the Almoravid expedition that conquered Ghana in 1076, and that the Almoravids would have survived the loss of Ghana and the defeat in the Maghreb by the Almohads, and would have ruled the Sahara until the end of the 12th century.
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