Why Didn’t Spain Conquer Portugal

Did Spain ever try to conquer Portugal?

In 1762, during the Seven Years’ War, Spain launched an unsuccessful invasion of Portugal. In 1777 there was a conflict between the two states over the borders of their possessions in South America.

How did Portugal stay independent from Spain?

Assorted References. Neighbouring Portugal acquired independence in 1668 after revolt and war protracted by the stubborn determination of Philip IV to maintain his patrimony. This small country had suffered since 1580 from its Spanish connection.