The Vietnam War Websites
Documenting the My Lai Massacre
This site features a number of useful documents on the 1968 My Lai massacre, the cover-up, and the trial.
Military History of the Vietnam War
PBS presents a site dedicated to the military history of the Vietnam War. It includes detailed descriptions of weaponry and strategies used on the battlefield.
On the Fall of Saigon
The New York Times offers a number of archived articles about the fall of Saigon printed in the paper in the days leading up to and following the final moments of the war.