Britain felt threatened by the Armed Neutrality Treaty of 1794, which originally involved Denmark and Sweden, and later Prussia and Russia.

In 1809, Danish forces fighting on the French side participated in defeating the anti-Bonapartist German rebellion led by Ferdinand von Schill, at the Battle of Stralsund.

When in the same year the Sixth Coalition isolated Denmark by clearing Northern Germany of French forces, Frederick VI had to make peace.

Accordingly, the unfavourable Treaty of Kiel was concluded in January 1814 with Sweden and Great Britain, and another peace was signed with Russia in February.

In 1961, a maritime dispute over fishing rights off the Faroe Islands, led to the Red Crusader incident.

[4] Queen Margrethe II of Denmark paid state visits to the United Kingdom in April/May 1974, and in February 2000.