Main articles: Denmark–Norway and Danish colonial empire
Portion of the Carta marina, an early map of Scandinavia, made around the start of the union with Norway.
After Sweden permanently broke away from the personal union, Denmark tried on several occasions to reassert control over its neighbour. King Christian IV attacked Sweden in the 1611–1613 Kalmar War but failed to accomplish his main objective of forcing it to return to the union. The war led to no territorial changes, but Sweden was forced to pay a war indemnity of 1 million silver riksdaler to Denmark, an amount known as the Älvsborg ransom.[31] King Christian used this money to found several towns and fortresses, most notably Glückstadt (founded as a rival to Hamburg) and Christiania. Inspired by the Dutch East India Company, he founded a similar Danish company and planned to claim Ceylon as a colony, but the company only managed to acquire Tranquebar on India's Coromandel Coast. Denmark's large colonial aspirations were limited to a few key trading posts in Africa and India. The empire was sustained by trade with other major powers, and plantations – ultimately a lack of resources led to its stagnation.
