Nice, I knew they were based on real people/names atleast at the time, but did not know any details. Intriguing to hear Pullo was such a significant career soldier, even changing sides lol.
Most books or movies about that era is allways about the main historifical ruling classes, so its fascinating to find anything fictional or otherwise about career soldiers. Thats why one of my most read book series (running for 10 years) is called
Under The Eagle, about two career soldiers Macro and Cato, one veteran and one younger, fascinating to follow their authentic quest across whole Roman empire in soldier/centurion level even if the writing is fairly easy to read action type.