Conrad Mazian is the leader of the Mazianni fleet (formerly the Earth Company Fleet). He is captain of ECS-1 Europe. His rise is described in Hellburner and Heavy Time. He was appointed spokesman of the early merchanter militia resisting Union by the other captains such as Kreshov and Porey. He was sent to Earth to lobby the United Defence Commands for larger warships. A fake Union attack by the merchanter militia Eagle and a speech to UN military leaders in Germany convinced them to built the Fleet, which gave Mazian more power than the other captains intended. The UDC gave them fifty ships but insisted on captains from Earth nations' militaries. These captains were inexperienced with interstellar war and rapidly died off and lost their ships, leading to Mazian's command of the fifteen remaining carriers. As leader of the fleet, he was responsible for executing the Earth Company's strategy in the Company Wars, a strategy that was ultimately unsuccessful. The fleet's actions early in the war are not explored in any current Cherryh novel, but the end of the war is described in Downbelow Station. In it, Mazian plans to force Union to expand faster than can in order to buy time, but the plan is interrupted by Earth Company representatives intending to buy time to build a second fleet. As a result of the two working at cross-purposes, Mazian chooses to destroy Pell Station and seize Earth itself in a coup, possible because of the immense destructive power of FTL capable warships.
Following his defeat at Pell and Earth, Mazian retreated into deep space, fighting a pirate action for decades. The fate of the fleet was never definitively determined. Most likely he lead the settlement of the unidentified forest planet at the end of Tripoint after some kind of split in the Fleet between himself and Edger and Porey.