 However, the Kingdom recovered its former glory under Šuppiluliuma I (c. 1350 BC), who again conquered Aleppo, Mitanni was reduced to vassalage by the Assyrians under his son-in-law, and he defeated Carchemish, another Amorite city-state.With his own sons placed over all of these new conquests, Babylonia still in the hands of the allied Kassites, this left Šuppiluliuma the supreme power broker in the known world, alongside Assyria and Egypt, and it was not long before Egypt was seeking an alliance by marriage of another of his sons with the widow of Tutankhamen.Unfortunately, that son was evidently murdered before reaching his destination, and this alliance was never consummated.