What was the first European country to have extensive contact with Sub-Saharan Africa?

Question

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Portugal was the first European country to have extensive contact with Sub-Saharan Africa, beginning in the 15th century with the exploration of the West African coast by Portuguese navigators. Portugal established trading posts and colonies along the coast, particularly in present-day Angola, Mozambique, and Guinea-Bissau. This early contact with Africa laid the groundwork for centuries of European colonialism and exploitation on the continent.

What Was the First European Country to Have Extensive Contact