The Real Story Behind the Roche Guard vs. the Bowery Boys Gang War

In 1979, the movie The Warriors depicted New York street gangs and was a hit, but it wasn't all that close to real life. Then the 2002 movie Gangs of New York did the same, but more than hundred years earlier. Was it at all accurate? Nobody from that period is around to tell us, but the fictionalized movie was based on a non-fiction book. If you saw the movie but didn't read the book, let's just…