I have a question that might sound like the most basic Babylon 5 question. Is there a function for each SG team on this series. I know SG-1 is the main group (You wouldn't have a show otherwise) but I hear a lot about SG-9, SG-11 and so on. What about SG-3, through SG-8. I mean for an underground bunker, how big is that staff?
As other have explained, some SG teams are specialized. There are some that specialize in diplomacy/first contact, some that specialize in scientific studies, some that are pure military. SG1 is probably called SG1 because it was the first team that was assembled to go through the stargate for the first time. Also, SG1 is the "Hero Ship" so naturally the series focuses on their adventures. But we do see other teams make appearances throughout the show. You can probably think of the SG teams like starships in Star Trek. They have different functions and they make appearances but SG1 is the Enterprise.