This is a compressed, summarized timeline to provide some context for the book of Daniel. This is based on some of the information provided in Jordan’s Handwriting on the Wall.
This assumes the Biblical dates are accurate and takes them seriously. It also makes the assumption that ancient kings had many names for themselves for different times and contexts, and many of them more like titles, such as Ahasuerus. A Biblical example is 1 Chronicles 5:26. There are also more modern cognates, like James I of England was first James VI of Scotland.