Denmark-Norway, also known as the Kingdom of Denmark, was a union consisting of the kingdoms of Denmark and Norway, including its territories in Iceland, Greenland, and the Faroe Islands. It was establish when the Kalmar Union was divided into what is now Sweden and Denmark-Norway. It was formed in 1536 when the countries were united. The political and economic power was centered in Copenhagen, Denmark.
Denmark-Norway has had a colonial empire since the 13th Century, when it obtained Estonia. It also used to hold Orkney and Shetland, but had been taken away by the Scots. The Dano-Norwegians tried to seize them many times, but have failed. In the 17th Century, Denmark developed a network of colonies, forts, and trading posts in Africa, India, and the Caribbean.
Denmark was a major ally during the First and Second Napoleonic Wars. It was united with France following a marriage with Napoleon’s sister with the king of the country.