The Battle of Dybbøl was the key battle of the Second Schleswig War, fought between Denmark and Prussia. The battle was fought on the morning of 18 April 1864, following a siege that began on 2 April. Denmark suffered a severe defeat which – with the Prussian capture of the island of Als – ultimately decided the outcome of the war, forcing Danish cession of the duchies of Schleswig and Holstein.

1864 is a 2014 Danish television historical war drama series written and directed by Ole Bornedal. It is based on two books by Tom Buk-Swienty about the Second Schleswig War of 1864 between Denmark and an alliance of Prussia and Austria which ended in defeat for Denmark and the loss of a quarter of its territory to Prussia. It follows two brothers from a remote village on Funen who enlist in the Danish army just before the outbreak of war, and experience the horrors of combat in Schleswig. It also features actual historical figures such as Danish prime minister D. G. Monrad and Prussian prime minister Otto von Bismarck. It was the most expensive Danish TV series to be made to date.