The Hanseatic League, also known as Hanseatica or the Hanseatic League, was a commercial and military alliance of Northern European cities that existed from the 12th century until the late 17th century.The Hanseatic League began as a trade organization representing the interests of merchants from a number of coastal cities in the Baltic and North Seas. The alliance was founded to protect merchants from pirate raids and incursions by other nations, as well as to regulate and control trade between member cities.The cities of the Hanseatic League had control over the ports and maritime trade of Northern Europe, exerting great economic and political influence in the region. The Hanseatic League was also an important military force, protecting the interests of its members through force of arms and diplomacy.Over time, the Hanseatic League expanded to include about 200 member cities, including Hamburg, Bremen, Danzig, Lübeck, and Rostock in Germany, Bergen in Norway, and Novgorod in Russia. The Hanseatic League became a major economic and political force in northern Europe, controlling the trade in grain, wood, wax, fish and other goods.As the great European empires expanded and maritime trade declined, the Hanseatic League gradually lost its influence and power. In the 17th century, the alliance was dissolved and most member cities resumed direct control of their trade and economy.In summary, the Hanseatic League was a commercial and military organization of northern European cities that existed from the 12th century until the end of the 17th century. The League represented the interests of merchants from a number of coastal cities in the Baltic and North Seas, protecting them from pirate raids and incursions by other nations, as well as regulating and controlling trade among member cities. The Hanseatic League became a major economic and political force in Northern Europe, controlling trade in goods such as grain, wood, wax and fish. As the great European empires expanded and maritime trade declined, the Hanseatic League gradually lost its influence and power.