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BATTLE // April 18, 1864

Battle of Dybbøl

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Overview

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.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Battle of Dybbøl was the decisive engagement of the Second Schleswig War. Fought on the morning of 18 April 1864 following a siege that began on 2 April, it ended in a severe Danish defeat. Prussia committed 11,000 troops against a Danish force of 5,000; Danish casualties of 3,534 far exceeded the Prussian toll of 1,201. Combined with the subsequent Prussian capture of the island of Als, the battle determined the war's outcome, compelling Denmark to cede the duchies of Schleswig and Holstein. The loss transferred control of the duchies to Prussia and Austria and marked a significant contraction of Danish territory, reshaping the political map of the region.

Forces & casualties

Troop strength

  • Prussia11,000
    medium
  • Denmark5,000
    medium

Prussia fielded a 2.2 : 1 numerical advantage

Casualties

  • Prussia1,201
    medium11% loss rate
  • Denmark3,534
    medium71% loss rate

Commanders (2)

Denmark

Prussia

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Related

6 sibling battles · 3 factions

Last verified June 2026
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