The Hellborn King by Christopher G. Brenning

SPFBO8

A kingdom at war. A royal family at war with itself. After the massacre of his people, Damien Dreadfire leads a patchwork army of unlikely allies against the Kingdom of Betanthia. The alliance teeters on the edge of a knife, as old rivalries between clans threaten to tear it apart. With the help of his trusted friend, Einarr, and a strange mystic, Damien launches a bold offensive that will decide the future of the free lands. Short on time, and even shorter on men, the fate of a once vibrant culture and its people rests on the outcome of the next battle. Meanwhile, Betanthia's crown prince, Gareth Bethard, faces dangers of his own. With his family coming apart at the seams and a growing conspiracy afoot, he tries desperately to hold everything together. Even as Gareth grapples with inner demons, he must learn to take up his father's mantle as the protector of civilization and defeat Damien’s invading horde. It's only the fate of a thousand-year dynasty resting on his shoulders, after all.