There is only one team real team. However, there is a temporary cloning device that allows for multiple versions of one person on the field at a time. Each merc is cloned on a daily basis (all of which are emotionless) and these close are destroyed at the same rate.
This allows for multiples of the same person on the field at a time without any evil twin scenario arising. Besides, Redmond and Blutarch have no idea, so the mercs get double the pay!
The scout’s 7 older brothers are actually some of the other mercs on his team. Excluding the spy, who is their step-father, the sniper, the heavy and the demoman.
The medic was actually from Boston as well, but he moved away to Germany once he was old enough, adapting to speak like he was from that country originally.
The pyro is actually a girl, who wears a suit in order to fool the administrator and fight with her brothers. She meddled with the other mercs information to make sure she was never discovered.
The Soldier, Scout and the engineer are the most matey in the group, since they all stayed in America rather than moving away like the medic.
The brothers and their step-father eventually got hired to fight for BLU because they were already close and knew how to work together. But one brother was fired after about a week and sent back to his mother, thus explaining the possibility of a tenth class.
The 7th brother was older than his siblings and was refused when BLU started hiring for being too old for the job and for being the one to remove the demommans eye. Rather than returing to his mother he moved in with the soldier and learnt magic once his sibling had left and after a fight with his brother, the soldier. He used this magic against them, changing his look and name so he wouldn’t upset the other mercs. His new name was Merasmus. None of the others exept the soldier knew who Merasmus really was. But the soldier never told them for fear of upsetting them.
The reason the RED spy is so hated by the BLU’s is because he was caught sleeping with their mother, thus making the BLU spy hate him even more.
My headcanon is the Blu Spy is more sneaky, while the Red Spy is more aggressive. The Blu Spy is better at blending in and deception, while the Red Spy is better at stairstabs, trickstabs and general combat.
(think of Blu Spy as Omfgninja, while the Red Spy is Stabbystabby)
The events of TFClassic and TF2 are canon to one another. The Mann brothers hired the Classic mercenaries and the teams were purely named after colours (Team Blue and Team Red). The Mann Brothers were also the Civilians and had there mercenaries as assassins to off one another or bodyguards to escort them through the Hunted game. Eventually the brothers founded Reliable Excavation Demolition and Builders League United and the new merc teams RED and BLU are successors to Team Red and Team Blue.
(OC) One time all the mercs went over to the Medic’s house for dinner as Medic invited them over after bugging his wife. There was drunkeness, chaos, and bad manners. From that day forward the Medic’s wife forbade the mercs to ever come over again. The only exceptions were Spy, Engineer and Heavy.