it gives a hint in a surviving fragment of the cypria, another epic of the series that is mostly lost, from the perspective of the gods zeus wanted to depopulate the earth because they were being a burden to her and polluting so he orchestrated the entire thing.  >        [-  ]                <>    ,            '  .  from the perspective of the men, troy was packed of gold so that was most likely their motive, i am betting on that personally.
Cyprus