Daniel had a series of prophetic visions (Dan 7-12). Those prophetic visions, which were all future to Daniel, have been long since fulfilled by Alexander the Great, Antiochus IV Epiphanes, and Jesus the Messiah.
“In the eighth chapter, Daniel describes in a vision the incredibly accurate occurrence of the Medo-Persian struggle with the rise of the Greeks. The first kingdom of the Greek empire defeats the Medo-Persians inside their own territory and then in the height of power the first kingdom is broken and divided into four horns or kingdoms. The incredible part is that Daniel not only gives this precise outline years before 325 B.C. when the events happened, but he also names the participants by name, before they had risen to power!”
Miller, Revelation: A Panorama, Ch. 2, “Revelation 13: The Little Horn and 666.”
“The general attack against the early date long claimed for the writing of the book of Daniel, and its authorship by the saintly Jewish captive and statesman, Daniel, is centered chiefly on chapter 11, which, it is widely assumed, offers a detailed description of the period of Antiochus Epiphanes and the wars of the Maccabees, in the second century B.C. No one, the critics claim, except a compatriot of that ruler, would be able to refer with such exactitude to actual events of the time.”
Froom, Prophetic Faith, Vol. 1, pp. 55-56.