What is the main idea of the things they carried?

"The Things They Carried" by Tim O'Brien is a collection of stories that explore the physical and emotional burdens carried by soldiers during the Vietnam War. The main idea revolves around the weight of war, both literal and metaphorical, and its impact on the soldiers' lives long after the war has ended. It delves into the themes of memory, storytelling, and the blurred lines between truth and fiction.