AI overview
I don't have sufficient context to write an accurate overview of "917." The context provided only mentions "year," which could refer to many things—a historical year, a model number, a code, an organization designation, or something else entirely. To provide an accurate and factual overview, I would need more specific information about what "917" refers to.
AI-generated from the Wikipedia summary — may contain errors.
Article
The Bulgarian victory at the Achelous River. Map of the Battle of Achelous.
Year 917 (CMXVII) was a common year starting on Wednesday of the Julian calendar.