We talk about that in another video, or in several videos in some detail. But Alexander the Great, he has this vision of a one nation, of these people, kind of their cultures mixing together, and there's a significant amount of cultural mix between the Greeks and the Persians, but then Alexander dies and his empire is split, but most of the Persian Empire goes to, under the control of Seleucus, who's one of Alexander's generals, and then you have the Seleucid Empire, which is really foreign rule of Persia, and that will continue for a while until eventually the Parthians, which is once again another state or region of the Persian Empire, takes control to establish the Parthian Empire, which is one of the rivals to Rome. That's worth mentioning, and I mentioned this in the video on ancient Persia, that under Persian rule, and Cyrus, and the various Shahs and Shahs, they were famous for delegating their authority. When you have such a large empire, you can't control all of it yourself, so each of these regions had their own, I guess you could say, governors, and those governors were called satraps, and the regions were called satrapies. Anyway, I will leave you there. Oh, the other thing that Cyrus the Great is really known for is the spread of the Zoroastrian faith. We talk about the Zoroastrian faith in other videos, and Zarathustra, who was kind of the prophet of the Zoroastrian faith, he lived someplace between 1500 BCE, and might have even lived shortly right before, almost near the time of Cyrus the Great, but it was really Cyrus the Great who helped spread this great ancient faith.