Loving this path so far, but since Golarion is a new setting for some of my players, I wanted them to know about some of the events that shaped the land where they are adventuring. I felt that there should be someone to explain some of the reasons why things are the way that they are, as well as providing background information on some of the people that the PCs meet. Somewhat inspired by the Prologue of Fellowship and the Erebor scenes from 'The Hobbit' I thought a Galadriel-like narrative detailing the history of Ustalav would prove enlightening to my players. I plan on reading this history as a narrative from Alpon Caromarc at the beginning of the third module, helping me foreshadow some of the things that they'll face in modules 3-6. What is below is taken from the Inner SeaWorld Guide, Rule of Fear, and the AP itself. I'm pretty sure the content is accurate to canon, though if anyone sees any errors, let me know!** spoiler omitted **...
According to "Rule of Fear", Soividia Ustav established the nation of Ustalav in 2361 AR. The events of "The Haunting of Harrowstone" occur in the year 4711 AR. This means that the nation of Ustalav has existed for approximately 2,350 years, not the "Over 7 millenia ago" as claimed in "A Brief History of Ustalav."
Tar-Baphon rose as the lich-king "The Whispering Tyrant" in 3203 AR, meaning that Ustalav was relatively peaceful for approximately 842 years. Or for the 341 years since the establishment of the sixteen counties by King Kaldemov in 2862 AR.