The Battle on the Marchfeld (i.e.

Morava Field) at Dürnkrut and Jedenspeigen takes place on August 26, 1278 and is a decisive event for the history of Central Europe for the following centuries.

The opponents are a Bohemian (Czech) army led by the Přemyslid king Ottokar II of Bohemia and the Imperial army under the German king Rudolph I of Habsburg in alliance with King Ladislaus IV of Hungary.

Although both sides have in their units also infantry, the battle itself is primarily a great collision of heavy knights cavalry, though the Cuman horse archers in the Hungarian army play a vital role.

The battle is finally won by an ambush attack of the united Imperial-Hungarian forces, which is in these times considered dishonorable and against the rules of knighthood.