How would the possible alternative endings to the film change the way the film resolves its themes and narrative ?

- How would the possible alternative endings to the film change the way the film resolves its themes and narrative ? - How the ending of the film resolves or questions the narrative ,moral and social themes of the film , such as heroism, the ethics and purpose of the Vietnam war , Willard's journey and identity, the nature of evil, power ,sanity and insanity. an alternative ending to this film would be just chaos, total chaos.