 There the Roman general Timesitheus fought against the Sasanians and won repeated battles, and recaptured Carrhae and Nisibis, and at last routed a Sasanian army at Resaena, forcing the Persians to restore all occupied cities unharmed to their citizens.“We have penetrated as far as Nisibis, and shall even get to Ctesiphon," the young emperor Gordian III, who had joined his father-in-law Timesitheus, exultantly wrote to the Senate.The Romans later invaded eastern Mesopotamia but faced tough resistance from Shapur I returned from the East.