My best guess is that you mean 'The quiet american'
I think you are looking for 'The Killing Fields' but it was Cambodia instead of Vietnam and Sam Waterston instead of Tom Hanks. The Asian actor Haing S. Ngor was Cambodian by birth, and he won the Acadamy Award for Best Supporting Actor.
It could also be 'We Were Soldiers' with Mel Gibson. There was a photo journalist with them at the battle.
Volunteers 1985, it was about Thailand
The cast of Plus ou moins Geek - 2012 includes: Erell as Herself - Journalist Nico Augusto as Himself - Journalist (History, Science) Fred Molas as Himself - Journalist (Video Games) Lena Polin as Yumi - Journalist (Cosplay) Baptiste Poulain as Himself - Journalist (Science and New Technologies)
The cast of Culture Pub - 1987 includes: Frank Annese as Journalist Christian Blachas as Host (1987-2005) Benjamin Bloch as Journalist Alain Chabat as himself Roxanne Frias as Journalist Anne Gelos as Researcher Thibault Hofer as Researcher Anne Magnien as Co-host (1987-1995) Didier Porte as Journalist Elie Semoun as himself
The cast of Artista Academy Breaktime - 2012 includes: Vin Abrenica as Himself - Academy Student Sophie Albert as Herself - Academy Student Marvelous Alejo as Herself - Academy Student Akihiro Blanco as Himself - Academy Student Alberto Bruno as Himself - Academy Student Jeffrey Espiritu as Himself - Host Nicole Estrada as Herself - Academy Student Benjo Leoncio as Himself - Academy Student Shaira Mae as Herself - Academy Student Brent Manzano as Himself - Academy Student Valeen Montenegro as Herself - Host Chanel Morales as Herself - Academy Student Julia Quisumbing as Herself - Academy Student Malak So Shdifat as Herself - Academy Student
The cast of Looking for Fidel - 2006 includes: Fidel Castro as Fidel Castro Leonardo Corbucci as American journalist
Benicio del Toro, as he has won an Academy Award, a Golden Globe, a Screen Actors Guild (SAG) Award and a British Academy of Film and Television Arts (BAFTA) Award. Coming in a close second, José Ferrer has won an Academy Award, a Golden Globe Award, and three Tony Awards.
The cast of The Fall of Saigon - 1995 includes: Gerald Ford as himself Henry Kissinger as himself James Schlesinger as himself Garrick Utley as Narrator
The cast of Saigon - 1967 includes: Morley Safer as Narrator
The cast of Saigon - 2010 includes: Giorgio Lisciandrello as Sniper soldier
The cast of Saigon Nights 3 - 1994 includes: Billy Shane
The cast of Drengene fra Saigon - 1997 includes: Henning Becker as himself
The cast of Saigon Nights 2 - 1993 includes: Ky Duyen as Himself - Host
The cast of Saigon Marine - 2004 includes: Gerald Ford as himself Henry Kissinger as himself
The cast of Dem Saigon 1 - 1992 includes: Nguyen Cao Ky Duyen as herself
The cast of 20 Meilen vor Saigon - 1970 includes: Roger Leonard as himself
The cast of Amerikas Trauma - Von Saigon bis Bagdad - 2004 includes: Nguyen Giap Vo as himself
The cast of The Journalist - 2006 includes: Charles Awurum Caroline Ekanem John Okafor
The cast of Number 10 Blues Goodbye Saigon - 2013 includes: Kenji Isomura as Taro Eiichi Kikuchi Lan Thanh as Lan Sing