Sigma is an odd case. In the year 2077, standard terra time, the Empire of man was attacked on Earth by a race know as the Corodians. The Corodians were vicious and ruthless, far stronger than any human and had tech beyond human comprehension. They were left with one choice, to make an army of genetically enhanced super soldiers. From there the GEO (Genetically Engineered Organism) Program was initiated. Every man and woman entered into the army, and now every antrho. But with everyone in the military they needed people to run the factories. Thus work GEOs were made. Sigma was the last and best military GEO to be made. A single GEO was able to complete a mission that would have taken 10 elite operatives. They were the best of the best and to top it off were given the best gear. Within a matter of months the war was over and the humans won but now there were over 2,000,000 GEOs in existence 250,000 of which were able to kill a man 50 different ways just using their hand. So the empire debated what to do, eventually half thought we should be executed, they figured we had served our purpose and should be gone. But the other half...the other half claimed the Empire to be inhumane and wrong, it only took a few days for a civil war to break out between the New Empire of Earth and The Empire Of Man. Eventually the war ended with a peace treaty. The Empire Of Man would keep the system off Sol and not interfere with the Galactic Republics buisness. The antrhos would become citizens with equal rights within the Republic. But Sigma was dangerous...too dangerous. The Republic would not kill him and Sigma knew that if he did not leave they would lock him up. So he left for a little planet, not known to many people where he could live his life. This happened to be the same place where Nixon was. The two met when Sigma was walking down the street and noticed a very troubled looking Lombax. Eventually they got into a discussion about his problem. Nixon needed money, Sigma had war funds he was not using. So Sigma gave him the money to leave the planet, but kept in contact with him.