18 April 1864

18 April 1864 marks the assault at the Battle of Dybbøl, a turning point in the 1864 Danish–Prussian War that brought the besieged Danish forces to the brink of destruction. For Rudolph Kaspersen, then an eighteen-year-old second lieutenant, the day became a fight to escape a position where Prussian forces were taking no prisoners.

The Siege and the Day Before

The attack came after Prussia had laid siege to Danish forces at Dybbøl for two months. The bombardment was described as the most intense in military history up to that point, while Denmark was already losing the war. A photograph taken on 17 April, the day before the assault, showed Rudolph Kaspersen at eighteen, already holding the rank of second lieutenant in the Danish army.

The Assault and Breakout

On 18 April, Prussian forces attacked. Danish positions were overrun quickly, in part because Danish troops were outnumbered four to one in most places. When Rudolph Kaspersen’s position fell, the Prussians were not taking prisoners; survival depended on fighting out. He led what became a suicide attack against them. His brigade held the advancing forces for an hour or two, but more than half its members were dead by the end of the day. Rudolph Kaspersen made it out alive.

Aftermath and Historical Significance

The Dybbøl offensive effectively ended the war. Rudolph Kaspersen’s military career ended with the battle, and he had returned home by the time Denmark signed a treaty on 30 October 1864. The date thus joins a decisive military defeat to a sharply personal outcome: an eighteen-year-old officer survived the breakout, while the cost to his brigade was catastrophic.