As far as the drug trade goes in new york its a mixture of dominican, mexican ,jamaican and puerto rican drug smuggling groups that are bringing in cocaine and heroin from their countries and then selling it either wholesale or packaging it up ready for retail to their own gangs or someone else's. I think that the dominicans are the most prevalent out of these groups in the north east. You then have some african american suppliers that are shipping cocaine from the west coast and places like atlanta and texas, or they are buying it off local dominicans in manhattan and then setting up pipelines to other areas of sale like upstate new york, these pipelines are often street gang affiliated.Then you got albanians that are involved with smuggling marijuana from canada, they have also been involved with heroin and cocaine trafficking as well as synthetic drugs, so they are sort of all over the place but none the less very active in the drug trade.Asian gangs vary from being fringe to heavy players in the drug trade, vietnamese gangs are heavily involved with grow ops not to sure about other asian groups. La cosa nostra drug activity by most recent examples is cocaine, marijuana, ecstacy and pescription pills, however the major difference between them and the other groups is that their drug activity is not continuous for example when a mafia connected drug ring is taken down the chances of another mobster coming in and replacing it are slim. This is one of the reasons why they are no longer on top the drug trade anymore.