Swedish colonization primarily occurred during the 17th century when Sweden sought to expand its influence in the Americas. The most notable settlement was New Sweden, established along the Delaware River in 1638. This colony included parts of present-day Delaware, New Jersey, and Pennsylvania, and was focused on trade, agriculture, and fur. The Swedish presence in North America was relatively short-lived, as the Dutch seized control in 1655. Despite its decline, the legacy of New Sweden remains, influencing local culture and place names. The colonization efforts reflect Sweden's ambitions during a time of European exploration and competition.