The Isted Lion (or "Flensburg Lion") ( or "Flensborgløven"), or ) is a Danish war monument originally intended as a monument of the Danish victory over German-minded Schleswig-Holstein insurgents in the Battle of Isted (Idstedt) on 25 July 1850, during the First Schleswig War which was a civil war within the Danish Realm, although with troops from Prussia supporting the Schleswig-Holstein insurgents. At its time it was the largest battle in Scandinavian history.