The movie encountered a vast number of problems during filming, from Brando arriving on the set overweight and completely unprepared, which delayed the shooting countless times, to expensive sets being destroyed by severe weather.
The movie’s lead actor Martin Sheen even suffered a heart attack while on filming location, and the movie’s release was postponed several times while Coppola edited millions of feet of footage.
However, it all paid off. All the madness and sanity, life and death, good and evil of the war were presented to common folk like no other movie had done before, and it is now widely regarded as one of the greatest films of all time.