The Vietnam War was fought between 1964 and 1975 in South Vietnam, bordering areas of Cambodia and Laos, and bombing passed through North Vietnam as well. One coalition consisted of the United States, the Republic of Vietnam, Australia, New Zealand, and South Korea. The opposite forces consisted of North Vietnam, and the National Liberation Front, a communist-led South Vietnamese guerilla movement.
In several ways, the Vietnam War was seen as a direct successor of the French Indochina War, in which French fought to keep control of their colony in Indochina against an independence movement led by Communist party member Ho Chi Minh.
On January 15, 1973 President Nixon ordered a suspension of offensive action in North Vietnam which was later followed by the unilateral withdrawal of US troops from Vietnam. The Paris Peace Accords were later signed on January 27, 1973 which officially ended US involvement in the Vietnam conflict.
The War had a large impact on society and the photographs taken were an important part of it. Photography is always used as an effort to teach people about what is going on in the world, especially in the case of war. These photographs allowed people to see firsthand what was happening overseas. “They moved us, made us feel sickened by what we saw and endangered many of us in a sense of outrage.” 
Memorable photos always have an impact because it touches an emotion inside a person. With photos involving war, sometimes it’s the most compelling or horrifying images that stay with us forever and leave an imprint in our mind. War photography in general expresses these ideas because it presents a view that the rest of society, outside the war, never sees.
Phillip Jones Griffiths, a photojournalist known for his photographs of the Vietnam War, covered the before and after effects and his work was considered “unprecedented.”
US Marines inside the Citadel rescue the body of a dead Marine during the Tet Offensive. 1968
Source: Magnum Photos
 Vietnam War. http://www.vietnam-war.info/summary/ (accessed April 22, 2010).
 Rodd, Emily. “The impact of photography on our lives – how photos influence ideas and opinions.” PSA Journal, 1993.