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In page Guinea-Bissau:

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The deep history of what is now Guinea-Bissau is poorly understood by historians. The earliest inhabitants were the Jola, Papel, Manjak, Balanta, and Biafada peoples.[citation needed] Later the Mandinka and Fulani migrated into the region in the 13th and 15th centuries respectively. They pushed the earlier inhabitants towards the coast and onto the Bijagos islands.[1][2]: 20