On this page we have a series of links related to how the Clash of Empires rules work, including articles on assembling army lists, quick reference sheets, after action reports, errata/optional rules, new scenarios and a preview of the book.
Clash of Empires Preview
Assembling the Army - EIR Assembling the Army - Anglo Danes
EIR vs Ancient British Battle Persians vs Greeks Battle
Errata/Optional Rules (Nov 2013) Quick Reference Sheets
War Wagon Rules (September 2012)