Fortress of Spears (Empire)

The battle for Hadrian's Wall has been won but the enemy is not destroyed.  Calgus, the rebel war leader, has retreated deep into his people's northern territory. The new Roman leader makes an audacious plan to take the legions—and more important, the cavalry—north to their strongholds. Marcus Aquila, disguised as Centurion Corvus, is caught up in the campaign even though it will mean constant danger of being discovered by his family's enemies. His protectors, though, are powerful.