Sylvester Stallone appears uncredited as a subway thug. This was one of his earliest film roles, not a cameo. According to website Every Woody Allen Movie, "Allen initially sent Stallone back to the casting agency after deciding he wasn't 'tough-looking' enough. Stallone pleaded with him and eventually convinced him to change his mind".
According to the Eric Lax biography, the musicians in the dinner scene at General Vargas' house were actually to be playing instruments, but the rented instruments hadn't arrived, and rather than wait, Woody Allen decided the miming would fit with the tone of the film.
The movie's mock-TV ad for New Testament cigarettes earned the movie a "Condemned" rating by the Catholic Church.
During the training montage when Fielding is learning how to throw a hand grenade, the pin in his hand explodes after he throws the grenade. The reaction by Woody Allen is real as he was slightly singed by the incendiary device hidden in his hand, but Woody decided against doing the scene again and left it in the film as is.
The very short song "Rebels Are We" that Esposito sings to his men is later sung by Diane Keaton when she becomes a rebel in Woody Allen's later film El dormilón (1973).