The term "Swedish Colonies" refers to territories established by Sweden during the 17th century, primarily in North America and the Caribbean. The most notable colony was New Sweden, founded in 1638 along the Delaware River. This settlement included parts of present-day Delaware, New Jersey, and Pennsylvania. Sweden's colonial efforts were driven by trade and agriculture, focusing on fur trading and tobacco cultivation. However, the colonies faced challenges from neighboring powers, particularly the Dutch and English. By 1655, the Dutch seized control of New Sweden, marking the end of significant Swedish colonial ambitions in North America.