Battle of Ménfő

{{Short description|Battle restoring Peter Orseolo to the Hungarian throne}}

{{Infobox military conflict

| conflict = Battle of Ménfő

| partof = German-Hungarian War (1044)

| image = Chronicon Pictum P050 A ménfői csata.JPG

| image_size = 275

| caption = Battle of Ménfő. In the corner of the picture is a depiction of the killing of Samuel Aba (Chronicon Pictum)

| date = 5 June 1044{{cite book|author=Pál Engel|title=Realm of St Stephen, The: A History of Medieval Hungary, 895-1526|url=https://books.google.com/books?id=fBG9BAAAQBAJ&pg=PT47|date=23 February 2001|publisher=I.B.Tauris|isbn=978-0-85773-173-9|pages=47–}}

| place = Ménfő, Hungary

| result = German victory
Peter Orseolo becomes King of Hungary

| combatant1 = {{flagicon image|Banner of the Holy Roman Emperor with haloes (1400-1806).svg}} Holy Roman Empire

• Kingdom of Germany

Hungarian supporters of Peter Orseolo

| combatant2 = Hungarian supporters of Samuel Aba

| commander1 = Henry III
Peter Orseolo

| commander2 = Samuel Aba{{KIA}}

| strength1 = Unknown

| strength2 = Unknown

| casualties1 = Light

| casualties2 = Heavy

}}

The Battle of Ménfő was an important battle in the early history of the Kingdom of Hungary. Fought in 1044 at Ménfő, near Győr, between an army of mostly Germans and Hungarians (Magyars), it was a victory for the Germans and thus for Westernising influences in Hungary.

Peter Orseolo, who had been deposed by Samuel Aba in 1041, returned with the assistance of Emperor Henry III, and invaded Hungary in June 1044. His force was small and the Hungarian army of Samuel Aba was large. However, there was disaffection in the Hungarian ranks and the army quickly fell apart in the face of the German cavalry. Samuel fled the field, but was captured and killed. Peter was reinstalled as king at Székesfehérvár and did homage for his kingdom to Henry. The leading magnates and the less important nobles all came to Henry to make oaths of fidelity and vassalage. Hungary was made a vassal of the Holy Roman Empire, though it was not to remain so for long.