During filming, Gustav Hasford contemplated legal action over the writing credit. Originally the filmmakers intended Hasford to receive an "additional dialogue" credit, but he wanted full credit. The writer took two friends and snuck onto the set dressed as extras only to be mistaken by a crew member for Michael Herr

Goofs

Upon the initial attack at Hue City, many of the soldier's "bullets" are inconsistent with the actual line of fire. Sometimes the buildings show bullet impacts before the weapons are fired, while at other times, the weapons are fired with a clear line to the buildings, yet no impact craters or impact damage and smoke is seen - evidence that the soldiers are firing blanks. See more