This chapter is definitely one of the most interesting chapters of the whole book. “Sweetheart of the Song Tra Bong,” by Tim O’brien, is a very detailed story of a girl who comes to Vietnam. This chapter describes the changes in Mary Anne’s personality. But, the main idea of the chapter is the effects war has on people and their minds. The chapter started with a young soldier’s idea of flying his girlfriend over to Vietnam. The boy, Mark Fossie, knew it would be complicated but, Mary Anne managed to do it in a series of hitch hiked flights. In six weeks time, Mary Anne had shown up at the base. The guys described her as a 17 year old doll. Mary Anne and Mark Fossie had been in love since when they were really young. They had often talked about getting married together and felt as though nothing could tear them apart. After sometime at the base the guys were accustomed to having her around, but, they were surprised by her tolerance for Vietnam. Mary Anne was very to learn the ways of Vietnam and war. Her curiosity for Vietnam soon grew into an obsession and a passion. She would increasingly spend more times out on the field and in ambushes. The more she saw of the war, the more she wanted it, and slowly, the distance between her and Mark Fossie would grow. Fossie had a hard time with this and often times worried about her, he saw his love of his life being taken away from him. Soon enough, she had stopped spending time with him at all. She would sleep in a separate hooch with the green berets (hardened stealthy soldiers) or “greenies” as they were called. The surprising thing was, Mary Anne was not in love with another man, instead, her love had gone to war. Her personality deteriorated and her young girl looks had been changed, reformed. In the end she had even separated from the platoon and went off into the mountains never to be seen again. The jungle had taken her, the sights, the fear, the rush, the morbid reality of it all. It interested her, it tempted her. War has the harshest effects on people, training doesn’t make you a soldier, war does. Mary Anne become lost in her mind, war turned her into a weapon. She couldn’t be found nor’ could she be saved. This effect is described by a lot of soldiers, even those who manage to escape still bear the mental scars Vietnam had given them. PTSD (Post Traumatic Stress Disorder), is an effect of the mind that causes soldiers and veteran’s minds to overload in experiences that the brain finds similar to what they experienced in war. An example would be, a loud firework goes off and causes the veteran’s mind to compare that sound to gunfire, they then re-experience all the habits that they had to go through in war. Their tactics and mindset comes back in that small moment and overloads the brain. These effects of war are horrible, war changes you into a different being, you no longer feel the like you used to, you become a weapon not a loving human.