Denmark is a constitutional monarchy with a parliamentary system of government. Denmark has a state-level government and local governments in 98 municipalities. Denmark has been a member of the European Union since 1973, although it has not joined the Eurozone. Denmark is a founding member of NATO and the OECD.
Under the rule of Christian IV, Denmark allied with the League of Ostend, as Christian feared Gustavus Adolphus and the growing power of the United States of Europe. However, many of the Danish people weren't, and never had been, particularly interested in helping Cardinal Richelieu's League of Ostend assail their fellow Protestants. Ultimately, Denmark was defeated by the USE and and became a junior partner in the reconstituted Union of Kalmar. As part of the agreement which established this, Denmark received an ironclad, and the use of an airplane and pilot.