American-Vietnamese War movie recommendations: "Full Metal Jacket", "Apocalypse Now", "Deer Hunter", "Slaughter", "Birdman", "Field Platoon", "Heaven and Earth", "Good Morning Vietnam", "Vietnam War Hair", etc. 
The Killing Fields is a historical war film directed by Roland Joffe, starring Sam Watson, Wu Hanrun, John Malkovich, Julian Sanders, etc., and written by Bruce Robinson, which was released in the United States on November 2, 1984. It mainly tells the story of friendship and blood and tears between the New York Times war correspondent in Cambodia Sinny (played by Sam Watson) and the local translator Pandey (played by Wu Hanrun).
He**en & Earth is a war action drama film directed and written by Oliver Stone and starring Tommy Lee Jones, Debbie Reynolds, Wu Hanrun, Chen Chong, etc., which was released in the United States on December 25, 1993. The film is adapted from the autobiography of a real person, and is the last part of Orange Stone's "Vietnam War Trilogy", which tells the story of the fate of a Vietnamese girl Lily (played by Le Thi Ha) in the war, and her later struggle after following her husband James (played by Tommy Lee Jones) to the United States.
Good Morning Vietnam is a film directed by Barry Levinson and starring Robin Williams, Forest Whitaker, Bruno Kirby, Richard Nixon, etc., and was released in the United States on December 23, 1987.
The film tells the story of Robin Williams as a DJ of the Vietnamese military radio station, who hosts the morning radio show every day in a witty style, which is very popular with the GIs. Later, he went deep into the folk life of Vietnam and gradually liked the country, so much so that he made some remarks on the show that contradicted the military propaganda, and suffered a gloomy fate.