He began his career covering conflicts in 1960, four years after joining the Associated Press (AP).
Horst Faas spent years educating and training new generations of photojournalists
He worked in what was then Zaire, and in Algeria, before relocating to Vietnam, where he won his first Pulitzer Prize in 1965.
Accepting the award, he said he aimed to "record the suffering, the emotions and the sacrifices of both Americans and Vietnamese in... this little bloodstained country so far away," AP said.
He had a front row view of much of that suffering.
When not in the midst of the conflict, Faas worked at AP's Saigon base, viewing and selecting images from his photographers to transmit on the wire to the rest of the world.
Under his direction, AP photographers captured images that quickly became synonymous with the long war: among the most notable were Eddie Adams' image of the execution of a Viet Cong suspect and Nick Ut's picture of a naked Vietnamese girl fleeing a napalm attack.
Despite being injured in 1967, he stayed in the country until 1970.