No problem with your Senior Project being more about sales than product assurance, but I get the impression you are taking it a bit too seriously. Not that history and chronology shouldn't be taken seriously, at least by those who can't find anything else to excel at, which seems to be my unfortunate situation.
By the way, I was thinking about going to see the movie "The History Boys" this week.
Kind of reminds me of your "gang" with the addition of Tracy.
Getting back to your questions, I finished up Part III of the book by using the standard date for Alexander's conquest and working backward, as in the following charts:
However, 330 BC will ultimately not hold water for the conquest of Alexander. Now that we've looked at the Ptolemaic Period it is obvious that it too has an inflated timeline and does not take into account likely co-regencies.
Proceding forward, even the early Christian Era dating appears to be slightly off. For example, it appears that Tiberius had at least a short co-regency with Augustus that is not accounted for in the standard chronology.
No doubt if we were to critically analyze subsequent periods we would find other opportunities to compress the timeline and bring it closer to reality. We might even find that radical reductions are needed in the so-called Dark Ages of Europe, as others already suspect.
About all I can say is that the Academic model of timekeeping has zero street credibility. Time and time again, we have found that the accepted chronology has nothing to do with a scientific approach. Rather, the various stages of history have been neatly divided up, with each given a specific amount of elapsed time that is preserved as sacred. The size of these individual slices were originally determined with far less information than we have today and by generally assuming maximum reign lengths, minimum overlaps between successive kings and rival dynasties, etc. (I would compare this technique to going to Vegas and consistently going against the percentages on a large number of bets. In real life you lose your shirt, among other things. In academia, it doesn't matter! But it is still an ironic fact that we have atomic clocks that are accurate down to the nano-second, but historically speaking we are centuries off!)
I don't have anything on "Usermontu", as I mentioned in a previous post.
© Charles N. Pope, US Library of Congress. All rights reserved.