 The enslavement of Africans was seen as a military campaign because the people that the Portuguese encountered were identified as Moorish and thus associated with Islam.The royal chronicler Gomes Eanes de Zurara was never decided on the “Moorishness” of the slaves brought back from Africa, due to a seeming lack of contact with Islam.Slavery in Portugal and the number of slaves expanded after the Portuguese began exploration of Sub-Saharan Africa.