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Mai Nam, a photographer with the North Vietnamese Army (NVA) during the Vietnam War, sorts through his negatives. Using old cameras and expired film he and his colleagues captured the experiences of the NVA and Viet Cong soldiers.

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This is one of the most famous photographs taken by Mai Nam. In 1966, near Vinh Phuc, north of Hanoi, he captured the moment the US pilot of this F-105 warplane ejects having been shot down.

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The Ho Chi Minh trail, used by the North Vietnamese to transport supplies south. Despite constant bombardment, photographer Trong Thanh spent five years on the trail, processing film as he went and carrying the negatives around his waist.

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This is another of Thanh's photographs, he remembers the pictured man and woman, who had grown up together in the same village. They passed one another briefly, and when they spoke "it seemed to me that they were in love".

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Mai Nam captured this shot in March 1968...

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...and this one, of North Vietnamese fighters firing guns at American warplanes after they dropped bombs in the area.

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The end draws near. After decades of war North Vietnamese troops travel south on the highway at Danang, en route for Saigon.

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Soldiers of the North Vietnam Army enter the Presidential Palace in Saigon. Hours earlier the last US troops scrambled aboard the final helicopters to leave the US Embassy in Saigon.

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Dinh Quang Thanh's images of the victorious NVA mark the end of the Vietnam War. Here, soldiers pose for the obligatory photo...

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...whilst others, such as these defeated officers of the Army of the Republic of South Vietnamese Army (ARVN) sit dejectedly outside the Presidential Palace.