Milan (268) — the same event in Aurelius Victor and Eutropius

Aurelius Victor: Gallienus, attacking Milan, where Aureolus is shut in, with every kind of siege engine, is killed by his own men.; Eutropius…

What each source says

Aurelius Victor, De Caesaribus · AD 268 · Milan

Gallienus, attacking Milan, where Aureolus is shut in, with every kind of siege engine, is killed by his own men.

Quam urbem dum machinationibus omnis generis oppugnat, ab suis interiit.
Location: Aur. Vict. Caes. 33.19

Eutropius, Breviarium · AD 268 · Milan

Gallienus is killed at Milan along with his brother Valerian.

Gallienus interea Mediolani cum Valeriano fratre occisus est imperii anno nono Claudiusque ei successit a militibus electus, a senatu appellatus Augustus.
Location: Eutr. 9.11

Show on the map — open Aurelius Victor, De Caesaribus