The Forever War

"The Forever War" is a science fiction novel by Joe Haldeman, first published in 1974. It explores the effects of time dilation experienced by soldiers fighting in a distant interstellar war against an alien species. As the soldiers travel through space, time moves differently for them compared to people on Earth, resulting in decades or centuries passing for those back home. The story highlights the futility and endless nature of war, the challenges of reintegration, and the evolving societal changes soldiers face upon returning. It serves as an allegory for the Vietnam War and the broader implications of conflict.