The Forever War

Yes. Joe Haldeman served as a combat engineer in Vietnam in 1969-1970, and the novel is widely understood as a direct allegory for the Vietnam veteran's experience, particularly the alienation soldiers felt returning to a society that had changed without them. The protagonist William Mandella's name is an anagram of the author's.

The novel won both the Nebula Award and the Hugo Award for Best Novel in 1976, placing it alongside works like "Dune" and "The Left Hand of Darkness" as one of the most decorated science fiction novels of its era.

Haldeman wrote two related novels: "Forever Peace" (1997), which won the Hugo Award for Best Novel despite not being a direct sequel, and "Forever Free" (1999), which does continue the story of William and Marygay Mandella. He also published a collection of related stories called "Peace and War."

The novel's central emotional device is relativistic time dilation: soldiers fighting at near-light-speed return from engagements to find that centuries have passed on Earth, making them strangers in their own civilization. This mirrors Haldeman's real experience of returning from Vietnam to a profoundly changed America.