Which city served as a co-capital of the ancient Persian Empire and was the scene of a bizarre mass wedding between hundreds of alexander the great's soldiers and native women?

The city that served as a co-capital of the ancient Persian Empire and witnessed a mass wedding between hundreds of Alexander the great's soldiers and native women is Susa. This event, which took place in 324 BC, was part of Alexander's efforts to unify his Macedonian soldiers with the local Persian population. The mass wedding symbolized the merging of cultures and aimed to legitimize his rule over the newly conquered territories.