The Marchfeld battle of 1278 put the Habsburgs in Austria

The Battle on the Marchfeld, fought on 26 August 1278 near Dürnkrut and Jedenspeigen north-east of Vienna, was the victory that gave the House of Habsburg the Austrian lands it would rule until 1918. Rudolf I, elected German king in 1273, and his ally Ladislaus IV of Hungary beat Ottokar II of Bohemia, who had refused to give up Austria, Styria, Carinthia and Carniola.

The Austrian broadcaster ORF puts the two armies at about 30,000 men in total, including some 4,000 Cuman horse archers on Rudolf’s side. ORF calls it one of the largest knightly battles in Europe, more than twice the size of Hastings. Rudolf kept units hidden in ambush, a move that broke the chivalric code of the day. Even so, the Habsburgs’ own history portal calls the win narrow. It became final only because Ottokar died in the melee, apparently murdered by personal enemies.

The reward also came slowly. Rudolf enfeoffed his sons with Austria and Styria only in 1282. Carinthia and Carniola were pawned to the counts of Görz and reached the Habsburgs in 1335. Rudolf’s line also failed to keep the German crown: his son Albrecht won it only in 1298. Patriotic historians later turned the day into a “national decisive battle”.

What the ground has (not) revealed

Before 2021, a single sword was the only find from a battle that left thousands dead. That summer the Ludwig Boltzmann Institute surveyed the area with lidar, magnetometry and ground radar. It found two 50 m² pits east of the village of Drösing that could be mass graves, but no one has dug them yet, and nothing else pointing to a battlefield. Historians say the surviving chronicles are too fragmentary and biased to reconstruct the battle. A peer-reviewed study published in 2025 argues the fighting may not have taken place on the plain between Dürnkrut and Jedenspeigen at all. The 750th anniversary in 2028 may come before anyone knows exactly where it was fought.