Siege of Milan
452 CE.
Shown on the map at 45.467°, 9.190°.
The siege and capture of Milan was one of the episodes of the Hun wars fought in Italy. It was carried out by Attila and his Huns in 452, it resulted in the victory of the barbarians and the destruction of Milan. Milan, then called Mediolanum, had been the capital of the Western Roman Empire until 402 AD.
Text from the Wikipedia article Siege of Milan (452), licensed CC BY-SA 4.0.