Factual error: In the scene where the Warriors are hiding from the Turnbull A.C.'s under the elevated subway they look up at the train that is approaching the station. The train is marked as a "J" train. At that point they are still in the Bronx. The "J" train never runs in the Bronx.
Factual error: In the scene showing the exterior of the "96 Street" subway station (at Broadway), the building shown is the 72 St station with the number changed from 72 to 96.
Factual error: In the opening sequence highlighting the journey made on the subway; it ends with them riding the 5 Train to the end of the line in The Bronx. This would place them next to Pelham Bay Park on the Northeast corner of The Bronx. However, it is believed that the meeting took place in Van Cortland Park on the Northwest corner of the Bronx. If the meeting were held in Van Cortland Park they would have taken the 1/9 Train (s) which end at 242nd St. and Broadway right outside of Van Cortland Park. The 5 Train station would be about a 15 minute cab-ride from Van Cortland Park; and they didn't take any cabs, and they sure didn't walk that distance either.