Thunder of the Gods: Empire VIII

The eighth book in the Empire series follows Centurion Marcus Aquila and his Tungrian legion as they undertake a perilous mission to the Parthian border, aimed at relieving a besieged fortress. Tasked with turning the disaffected Third Legion into a formidable force, Marcus then journeys to the Parthian capital, Ctesiphon, on a critical mission to appease the King of Kings and prevent a war that could threaten the empire.