(Editor's note: The first half of this column was published Sunday, Sept. 14.) The deteriorating morale of United States soldiers culminated in March 1968 when U.S. soldiers entered My Lai expecting ...

This costly conflict spanned generations—and its brutal legacy endures. But why did the bloodshed go on for so long?

Only a handful of Vietnam War movies have won Best Picture at the Oscars, including Platoon and The Deer Hunter, but which is ...