The Battle of Isted took place on 25 July 1850 near the village of Idstedt, today Schleswig-Holstein, Germany. The battle was part of the First Schleswig War.
The battle began early in the morning at around 2:00 and lasted until 19:00. The Danish took 1072 unwounded and 411 wounded prisoners. The Danish victory broke the Holstein army for good.
The Isted Lion commemorates the battle, which was at its time the largest in Scandinavian history. The battle's anniversary, 25 July, is a military flag day in Denmark.
N. F. S. Grundtvig's song "Det var en sommermorgen" ("It was a summer morning") touches on the battle of Isted.