The Anglo-Spanish War was a conflict between the English Protectorate under Oliver Cromwell, and Spain, between 1654 and 1660. It was caused by commercial rivalry. Each side attacked the other's commercial and colonial interests in various ways such as privateering and naval expeditions. In 1655, an English amphibious expedition invaded Spanish territory in the Caribbean. In 1657, England formed an alliance with France, merging the Anglo–Spanish war with the larger Franco-Spanish War resulting in major land actions that took place in the Spanish Netherlands.