OS is found in the Mayors office in City Hall in New York and Shanghai
LCN is found in the Real Estate office in New York and London
Dies Arcanum is found in the church (priest/missionary) in New York and Delhi
Eastern Triad is in the tea shop in London and Shanghai
Circle of Light in is the Bank in Shanghai and Delhi
Green Hand is in the Hotel in London and Delhi.
(may have confused the cities on the last two, since I don't use them :( )
Each faction is in two cities, and each city has 3 factions. I don't know yet what or how the new faction(s) works.