The Martial nations have collapsed and reformed numerous times in its history. The first civilization in Martial Space was the Triumvirate Civilization, first colonizing it shortly after 60,000 BCE. For a time, the remnants of the Triumvirate would exist in Martial Space with their loyal vassals, Rune-Err and Mahou. That was, until 20,751 CE, when Humans first arrived in Martial Space. The first emperor, Hal Drusus II, claimed that he saw a planet in a vision shortly after their arrival. He guided the ship to the location of what would later be named Scipio and before them was an oxygen-rich world with only oceanic life. It was close to the ideal planet to colonize. His followers would expand from here, using their hybrid biomechanical technology to colonize stars at a steady pace, constantly looking for metals in their metal poor region of Via Aylathiya.
After destroying the Triumvirate in 23,333 CE and subjugating its allies shortly after, they expanded to form a union with the other fairly humanoid species of the region called the "Neo-Terran Co-prosperity Sphere" in 27,945 CE. This sphere of influence extended throughout almost all of region, given that there were hardly any other nations in the region at the time. The duchies were first organized at this time. After over 2000 years of solid control over almost all Martial species, a new emperor began a policy of hyper-aggression towards unassociated species, ignoring the tentative relations humans had with the rest of the galaxy. The sphere collapsed due to internal pressure. The nation remained in separate duchies for over 30,000 years before being reunited not under humans, but under the Vexlores. They were inspired by the effectiveness of the Neo-Terran's biotechnology strategy, and implemented it as well. They reinstated it under the name "Dominium of United Duchies." For over five thousand years, the Vexlores were the center of Aylathiyan politics, and even united with the State of Tenshi for a time, giving them control over all of Ventemir in addition to their Aylathiyan holdings. They would end up collapsing due to a civil war known as the Tenshin Dispute in which the Ventemir Galaxy split away from the Dominium. The remainder of Tenshi split away following major destablization caused by the deaths of the emperor of the Dominium and the Archon of Tenshi.
For 20,000 years the Duchies remained separated. Only recently, in 97,821, did they finally reunite for the third time.
This list includes every emperor, chosen by the Blessing of Mars, that held power in the region that would become the GM. "Favor" is a measure of power an emperor has, with higher favor evidenced by superior thaumaturgical abilities. Before Emperor Jayvyn, the leaders of Martial Space were referred to as "Supreme Leaders" rather than the modern title of "Imperator." The title is not hereditary. Upon the ascension to the thrown, the Emperor is sometimes renamed to reflect the name of a previous Emperor. When selected, an individual will often feel a connection to the previous emperor who they are to change their name to. Personality changes to reflect this previous Emperor often follow name changes such as these.