What does choosing a faction give you? When you post in the forums on Battletech Universe, you are identified by your chosen faction. Also, that faction's ranking system is displayed as well. When you join a faction, you inherit the ranking heirarchy of that faction and begin the ability to gain rank. Rank is based solely on post count.
All of the Clan Factions.
All of the Inner Sphere factions.
All of the Mercenary factions.
All of the Periphery factions.
All of the Star League factions.
All of the Dark Age factions.
Inner Sphere Units
Units and League Factions.