The Romulan-Haakonan War was a war between the Romulan Star Empire and Haakona Prime. In 2156, Praetor D'deridex ordered Admiral Valdore to attack Haakona because D'deridex's father, also a Praetor, had been unsuccessful in conquering the planet. Valdore thought that the war was a foolish distraction from the Earth-Romulan War, but he carried out the Praetor's orders anyway. The initial assault on Haakona was quickly repulsed by the Haakonans using a previously unknown weapon and then the Haakonans began attacking Romulan outposts. (ENT - The Romulan War novel: Beneath the Raptor's Wing)