Rise of Eagles is an expansion to Clash of Spears This book expands the forces available in the core book adding 13 new lists. The lists include the Late Republican Army ( post Marian Reform ), the Early Imperial Army and enemies that fought against these armies such as Thracians, Germans, Britons, Dacians, Parthians, Spartacus Slave revolt, etc. We have also included the eastern enemies that Rome fought during the times of the Republic such as the armies of the successors of Alexander the Great or the Pontic kingdom. All in all this is a great complement to your core book multiplying the lists and periods in which you can set up your games. –Description from the publisher