The Order of the Book of Daniel

Here is something you might find worth looking into.  The book of Daniel is not written in chronological order.  Rather, it forms what is known as a "chiasmus."  Actually, there seem to be more than one instance of this literary form displayed in the book.

It follows this pattern:  A B C B A

http://www.bible.literarystructure.info/bible/27_Daniel_pericope_e.html

Perhaps the entire book is a chiasm:

http://mydigitalseminary.com/book-daniel-chiasm/

Daniel 3 and 6 (the fiery furnace and the lion’s den)
Daniel 4 and 5 (the humbling of Nebuchadnezzar and Belshazzar)
Daniel 2 and 7 (Nebuchadnezzar’s dream of empires and Daniel’s dream of empires)
Daniel 2 and 7-9 (visions of what will come between this time and God’s kingdom)
Daniel 1 and 10-12 (account of Daniel’s exile and the future return from exile)

The link below demonstrates the chronological timeline:

https://www.4truthministry.com/future/daniel-chronological.php

Perhaps this will be of use in understanding the book better, by comparing it with the historical sequence.  Daniel was more interested in presenting themes as opposed to a meticulous detailing of events by chronology.