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The Muslim Wandala state controlled large areas of the plains south of Lake Chad between the seventeenth and twentieth centuries a.d. The Wandala also engaged in an extremely complex, and often hostile, set of relations with the inhabitants of the Mandara Mountains, which bordered their state to the south and closely adjoined successive Wandala capitals. These Wandala – montagnard relationships had diverse economic, ritual, political and military aspects. Their complexity appears to be due in large part to the fact that the Wandala and many of the montagnard groups share ethnic origins, and to the violent processes by which differentiation took place and the Wandala gained hegemony on the plains. These processes probably began with a Wandala use of trading advantages to gain access to the Kanuri market system and the subsequent use of products so obtained to expand their dominion.
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Scott MacEachern (1993) studied this question.
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