The Battle of Pressburg was a three-day-long battle, fought between 4–6 July 907, during which the East Francian army, consisting mainly of Bavarian troops led by Margrave Luitpold, was annihilated by Hungarian forces.

The exact location of the battle is not known. Contemporary sources say it took place at "Brezalauspurc", but where exactly Brezalauspurc was is unclear. Some specialists place it in the vicinity of Zalavár; others in a location close to Bratislava, the traditional assumption.

An important result of the Battle of Pressburg was the Kingdom of East Francia could not regain control over the Carolingian March of Pannonia, including the territory of the later marchia orientalis, lost in 900.

The most significant result of the Battle of Pressburg is that the Hungarians secured the lands they gained during the Hungarian conquest of the Carpathian Basin, prevented a German invasion that jeopardized their future, and established the Kingdom of Hungary. This battle is considered one of the most significant battles in the history of Hungary, and marks the conclusion of the Hungarian conquest.