Yeah Memory Alpha has a lot of information but reading the main Starfleet article and the main Federation of Planets article would probably be a good place to start. Or just watch a bunch of Star Trek episodes, that is a good way to find good role playing ideas.
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=/\= =============================================== =/\=Retired Admiral James Alexander Knight
Medical Division, Command Advisor
Current Mission: Intelligence Review
Current Location: USS Osprey
=/\= =============================================== =/\="In war there is no substitute for victory." -General Douglas MacArthur