One of the great stories about the Vietnam war is “The Things They Carried” by Tim O’Brien. It was published in 1986 and describes the lives of seventeen American soldiers, led by Lt. Cross, fighting for their survival(Fiction 667). Tim O’Brien as a veteran of the Vietnam war, depicts all the events of the story similarly to his own experiences in the battlefield. In other words of contemporary criticism article “O'Brien explores the nature of courage and the writer's interest in transcending reality to represent the truths of experience”(Gale Database). And although the story is fictional, the narrative of it had creates a true image of what was happening. The story itself portrays the cruel truths behind the lives of American soldiers in Vietnam. And the constant psychological trauma that they interact with, on the battlefield, often results in developing of three major symptoms of Post Traumatic Stress Disorder. Post Traumatic Stress Disorder or simply PTSD, according to authors of National Center for PTSD web site “is a psychiatric disorder that can occur following the experience or witnessing of life-threatening events such as military combat, natural disasters, terrorist incidents, serious accidents, or violent personal assaults like rape”(The National). It is one of the major psychological problems that almost every soldier meets during and after the tragic event such as witnessing death of people around. PTSD has three symptoms: reexperiencing, avoidance and hyperarousal. And “The Things They Carried” is a perfect example showing all the symptoms of PTSD in story’s characters. Reexperiencing is the first symptom that influences soldiers in combat. It makes a person to undergo through flashbacks from past psychologically painful events(Encyclopedia). These flashbacks can also be triggered by things that are unrelated to war but somehow remind a person about it. On the other hand, a person can have such recurrence of these memories just because the person had a really disturbing image of the event. For example, Kiowa, one of the soldiers in Lt. Cross’s squad, had seen the death of Ted Lavender and described it as “…it was like watching a rock fall, or a big sandbag or something…”(Fiction 670). Death of one of his soldiers had also influenced Lt. Cross blames himself for this loss, because he had the responsibility for every one of the soldiers getting back home safe “Lt. Cross felt the pain. He blamed himself”(Fiction 670). Furthermore, lieutenant thinks it his fault, because he could not stop thinking about the girl he loves “…thinking he loved her more than anything, more than his men, and now Ted Lavender was dead because he loved her so much he could not stop thinking about her”(Fiction 670). These feelings of guilt and shame is another indication that Lt. Cross is under influence of PTSD. They also can be interpreted as “…having survived when others did not”(Encyclopedia 250). Second symptom of PTSD is avoidance. It is described as “reduced emotional responsiveness to the external world…”(Encyclopedia,249). In the story it is represented in Lt. Cross’s daydreams about Martha. He uses those thoughts to run away from the cruelty and stress of the situation around him. Moreover he does it subconsciously, without understanding that those thoughts influence his duties as a commander of a squad “Lieutenant Cross gazed at the tunnel. But he was not there. He was buried with Martha under the white sand at the Jersey shore”(Fiction,673). Also the fact that Lt. Cross doesn’t communicate with other soldiers leads to alienation and further increase in the effect that horrible events cause to his psychology. And finally leading to continuing avoidance. In addition using drugs is another way to avoid the cruel and deadly situation that the soldiers are in. For example: “Ted Lavender carried six or seven ounces of premium dope, which for him was a necessity”(Fiction 668). Smoking marijuana was the only way for him to forget about disturbing memories and the surrounding world of death. Third symptom of PTSD is hyperarousal. This symptom includes: “difficulty of falling or staying asleep, irritability or outbursts of anger, difficulty concentrating….”(Encyclopedia 249). This symptom may also cause anxiety and aggression which are widely expressed in the story “The Things They Carried”. In fact, one of the soldiers from the squad, Mitchell Sanders. He shows a really inhuman behavior towards dead corpse of a Vietnamese boy “He put his hand on the dead boy’s wrist…and used Kiowa’s hunting hatchet to remove the thumb”(Fiction 674). This is a true indication of the changes that this character goes through, during his mission in Vietnam. Besides this outburst of anger is involved in soldier’s behavior. Lt. Cross, after the death of one of his soldiers, burns all the letters that he received from girl he liked. Martha was her name. He does that because thinking about her made him weak as a soldier and a leader “he hated her…he was now determined to perform his duties firmly and without negligence”(Fiction 679). This was the final thing that he did to ensure he would stop dreaming because it was unreal. O’Brien wrote this story to show the reader the sides of human psychology that can change the personality of an individual. Story’s characters play a big role in representing one of the main themes of the story – fear of death. At the same time Tim O’Brien in his story tries to distinct all of the characters by their psychological symptoms of Post Traumatic Stress Disorder. For example: both Lt. Cross and Ted Lavender try to avoid the reality of the world around them by dismissing the it with any means they can. Such as dreaming about future and using drugs to suppress the feelings. Mitchell Sanders shows the aggression and inhuman behavior to compensate for his fear of dying. Kiowa is stressed out, because after watching Ted Lavender die and doesn’t feel sorry for him. At the same time, Norman Bowker was aware of what has happened to Ted Lavender and also he felt sorry for both, the victim and his commander LT. Cross. Because he knew that “ the lieutenant’s in some deep hurt”(Fiction 676). Furthermore all of these characters represent the memories of real Vietnam War veteran – Tim O’Brien who devoted his after war life to commemorate all the victims of a brutal, pointless war.