the following countries was the first to be colonized by the European power

The first country to be colonized by a European power was the Dominican Republic, which was colonized by Spain in 1493.

The first country to be colonized by a European power was Portugal. Portugal started colonizing overseas territories in the 15th century, beginning with the establishment of trading posts along the West African coast. They then went on to colonize territories such as Brazil, Angola, Mozambique, and several other regions in Africa, Asia, and South America.