Martin was a Colonial Warrior of unknown rank (presumably Ensign or Cadet, due to apparent demeanor) who was marooned on the planet Equellus after a quarrel with Cylon fighters in the Hatari system, similar to the situation facing Apollo several yahren later.
Martin was injured when he crash landed on the planet. Vella, a local rancher, nursed the Warrior back to health. In the process, Vella and Martin fell in love, were married, and had a child together, Puppis. According to the best recollections of Vella and her brother Bootes, Martin had started to relax into the lifestyle of an oviner (rancher), though he never quite managed to get the stars out of his head. He used to gaze up at them from their yard with the infant Puppis on his chest.
Martin told very little of his past life as a warrior; the only time he ever opened up was on the eve of his wedding night, when he and his future brother-in-law Bootes had too much to drink. Apparently, though, Martin never told anyone about the existence of the Cylons, perhaps to shield them from the news that there was a machine race trying to destroy all of humanity, including the residents of their humble planet.
However, Martin's past came back to haunt him when a Cylon Raider crash landed on their planet. Two Centurions were destroyed in the crash, but one survived, although its memory was severely damaged. When Martin saw the Cylon, which would later come to be known as "Red-Eye", Martin retrieved his laser pistol in order to destroy the Cylon. However, Red-Eye killed him first (with an unknown weapon) and appropriated Martin's laser pistol. Martin left behind a wife (Vella) and a son (Puppis), as well as any family he had in the Twelve Colonies of Man before being marooned (The Lost Warrior).