85 A.D. The Roman Empire expanded its conquered territories north to the Danube River. One kingdom is still a serious threat – the third most powerful military power in Europe and the richest nation in the region. That nation is Dacia, led by its young and brilliant military leader King Decebal.

It is 58 BC, and the mighty Tenth Legion, camped in Northern Italy, prepare for the arrival of the most notorious general in Roman history: Julius Caesar. Marcus Falerius Fronto, commander of the Tenth, is a career soldier and long-time companion of Caesar's. Despite his desire for the simplicity of the military life, he cannot help but be drawn into intrigue and politics as Caesar engineers a motive to invade the lands of Gaul.

25 BC. Titus Cervianus is no ordinary soldier. A former surgeon from the city of Ancyra, he's now a capsarius—a combat medic. Cervianus is a pragmatist, a scientist and truly unpopular with his legion. The Twenty Second Deiotariana have been sent to deal with uprisings and chaos in Egypt. Yet the Twenty Second is no ordinary legion either. Founded as the private royal army of one of Rome's most devoted allies, the king of Galatia, their ways are not the same as the other legions, a factor that sets them apart and causes friction with their fellow soldiers. 

Will Britain take him in... or mark him as its enemy? Faustus Valerianus is the son of a Roman father and a British mother, a captive sold among the spoils after Claudius’ invasion. When both parents die within a month of each other, he sells the family farm and enlists, joining legendary general Agricola’s campaign to conquer the entirety of the British Isles. But Faustus will have to contend with more than ferocious British warriors and whip-cracking elements. For the bonds of blood can weigh heavy on one’s soul. The call of his mother’s true people.

989 AD. Alfred the Great’s dream of a united England has been forged by his daughter Aethelfaed and grandson, King Aethelstan. The Vikings have been expelled from York following the death of Erik Bloodaxe, and for two generations there has been peace between Saxon and Dane. A new Viking warlord Olaf Tryggvason seeks revenge for Bloodaxe's death and the slaughter that followed, and has set his sights on a fresh assault on England’s shores. With Skarde Wartooth they set sail for Saxon lands, hungry for glory, conquest and vengeance.