And I will stir up Egyptians against Egyptians, and they will fight, each against another and each against his neighbor, city against city, kingdom against kingdom;
Isaiah 19:2 ESV

Remember that Egypt Is often used in prophecy as a metaphor of the whole world apart from Israel. “Kingdom against kingdom” could refer to upper and lower Egypt, but likely also refers to the kingdoms of all the world. God judges one nation by sending another nation.