On April 18, Denmark celebrates one of the military dates —, the anniversary of the Battle of Dubbel (date. Slaget ved Dybbøl). In honor of this event, the national flag is raised in the country and ceremonial and commemorative events are held.
Military flag days (holidays and memorable dates in honor of which the national flag of Denmark is raised in places established by law), separated into a separate group, refer to various periods of Denmark’s wars with its closest and distant neighbors.
On April 18, 1864, during the Danish-Prussian War (Second War of Schleswig), Danish troops were defeated near the city of Dubbel. During this battle, about 4,800 Danes and about 1,200 Prussians were killed, wounded or captured.
As a result, on October 30 of the same year, a peace treaty was signed in Vienna. Denmark renounced its claims to Lauenburg, Schleswig and Holstein. The duchies were declared joint possessions of Prussia and Austria.
By the way, in addition to the Battle of Dubbel, other battles of the 1864 war with Prussia and Austria for the redivision of Schleswig are flag days in Denmark: the Battle of Mysunde (February 2) and the Battle of Helgoland (May 9).