After watching various clips of the movie, The Warriors, I got thinking about Cyrus's plan to unite all the gangs and basically make all of New York thier own turf. Is this remotely possible in OTL? Say that the rising crime of the 1970's gets worse somehow and a hugely charismatic gang leader from Harlem or another New York borough gets the same idea and manages to, if not unite the gangs, then call a truce to focus them against the establishment. Could they pull it off and bring a city like New York to a stand still? Or would they get crushed with the combined force of NYPD and possibly the FBI if things got real ugly?