The main events in Danish history are:

1397, Denmark, Sweden and Norway formed a Commonwealth (Kalmar Union), and Margaret I was crowned king. The three constituent countries enjoy equal status in the Federation.

1849 On June 5th, Denmark made a peaceful transition from absolute monarchy to constitutional monarchy.

1864, Denmark was defeated in the Prussian War and was forced to cede Schleswig-Holstein province to Prussia.

1944, Iceland declared its independence from Denmark and became a republic.

1948, Faroe Islands gained partial autonomy.

After World War II, Denmark participated in the establishment of the European Free Trade Association, the North Atlantic Treaty Organization and the United Nations, so Denmark was a founding member of these organizations.

1973, Denmark joined the European Economic Community by referendum.