"1864" was produced by Miso Film for DR. It was a co-production with Film Fyn, TV2 (Norway), TV4 (Sweden), SF Studios, ARTE, ZDF Enterprises and Sirena Film (Czech Republic). DR had recently produced the highly successful series "The Killing", "Borgen" and "The Bridge", and several of the stars of those series, such as Lars Mikkelsen, Sidse Babett Knudsen and Søren Malling, were among the cast. "1864" was filmed on location at Dybbøl, scene of the climactic battle of the war, in the Svanninge Hills on Funen, and at Hagenskov, Egebjerggård and Hvidkilde Manors, also on Funen. The battle scenes were filmed in the Czech Republic over a period of seven weeks. Tom Buk-Swienty, on whose books the series was based, was a historical consultant on the series. It was the most expensive television series ever made in Denmark, with a projected cost of 173 million kroner (about $25 million).