Detective Comics (1937 1st Series) #685

"War of the Dragons, part 1 - The Iron Dragon," A gang war is starting to develop in Gotham's Chinatown, and Batman investigates the events with the help of Robin; One of the major crime bosses in Chinatown, King Snake, receives a warning but he kills the messenger as a way to send his own message; His actions put him against his right hand Lynx who challenges King Snake for the gang leadership just to be beaten by Snake; At the time, the GCPD is worried about a killer named Tommy Mangles that roams free the streets of Gotham; Bruce and Tim try to get some informants inside Chinatown