I've examined the time tables you've suggested and gone over any differences that exist between the entries. There are definitely more details in the History section than in the source I used (which was basically the submission on Khizaar). I've also found entries for the Massacre at the Silvershire and some other related sources (Evergrey Bridge, a sword called Or'injèrá) that further add to the details of the war between Erpheronia and Caltharia at the time.
I am interested in doing more elaboration of the Caltharian culture, as the story I would like to write about is set in Caltharia and deals with more their perspective of the War of Ancyros. For the meantime, I will stick to writing up smaller entries before I begin writing the story I mentioned above.
Also, is there anything specific on the Avennorians that I could help with right now?
Cheers!

Trel.