2 Chronicles 35:20

After all this, when Josiah had prepared the Temple, when his work of restoring the ancient worship had come to a close and an era of peace and prosperity might have been expected, Necho, king of Egypt, came up to fight against Charchemish by Euphrates, a great commercial city. And Josiah went out against him, either because he thought the neutrality of his country endangered, or because he felt that he must take the part of the Assyro-Babylonian king.