Question: Ezekiel 29:14-15 said that Egypt "shall be the basest of the kingdoms; neither shall it exalt itself any more above the nations: for I will diminish them, that they shall no more rule over the nations." But Egypt remained an important and often powerful nation. During the Tulunid dynasty (868-905 CE), for example, Egypt was the center of a small empire and conquered Syria.
Response: The Tulunid Dynasty was not an example of Egypt ruling over other nations. In fact, it was an example of Egypt being ruled over by outsiders. The short-lived Tulunid Dynasty was not of Egyptian origin. The dynasty's founder was a Turk named Ahmad ibn Tulun. He arrived in Egypt in 868 as vice governor for the Abbasid caliphate, which was based in Baghdad. He more or less broke away from the Abbasid caliphate and had his own little empire for about ten years, until caliphal troops were sent against him and he fled from Egypt and occupied Syria.
Ezekiel's prophecy was completely accurate. Egypt was a very powerful nation up until the time of Ezekiel, about 2600 years ago. At that time, a succession of nations and empires began ruling over Egypt, depriving the nation of sovereignty for centuries at a time.