Belisarius

“Belisarius” is a historical fantasy series by Eric Flint, reimagining the 6th-century Byzantine Empire with advanced technology and a darker, more brutal tone. The series explores a world where the Roman Empire never truly fell, but instead grapples with technological innovation, religious conflict, and the constant threat of barbarian invasions. It’s known for its detailed worldbuilding and gritty, realistic portrayal of warfare and politics.