The Lohvian Cycle I by Alan Burt Akers

On the magnificent and mysterious, beautiful and terrible world of Kregen, a planet orbiting Antares four-hundred light-years from Earth, much may be achieved and much lost. Far more than merely a strong sword arm is required for victory. Far more than a cunning and devious brain is needed to secure success.

Having won his princess, Delia of Delphond, Delia of the Blue Mountains, and having become the Emperor of Vallia with Delia at his side as Empress, Dray Prescot has renounced the crown and throne. Any thoughts of a quiet life are foolish, as he well knows. Among the many problems besetting him, the most important are uniting the lands of Paz and beating off the viciously hostile raiders from over the curve of the sea, the feared and hated Shanks.

Containing three novels:

Scorpio Reborn

Scorpio Assassin

Scorpio Invasion