There have been several feminist research depicting Tim O’Brien’s fiction asdiscourses of masculinity, but none mention how the writer interprets the relationshipbetween gender and race in these texts. This article sees one of O’Brien’s most importantfictions, Going After Cacciato (1978), an anti-war novel, as his project to de-gender theAmerican colonial masculinity perspectives on the war. The novel is set during the war inVietnam. It is told from the point of view of an American soldier, Paul Berlin. Cacciato, oneof Berlin's squadmates, goes absent without leave to walk from Vietnam to Paris. The noveldescribes Berlin's imagined chase of Cacciato across Eurasia. Berlin’s two worlds, real andunreal, match each other in the way he looks at Asian women in particular, and Asian worldin general because they are both reflect the colonial masculine perspective.There have been several feminist research depicting Tim O’Brien’s fiction asdiscourses of masculinity, but none mention how the writer interprets the relationshipbetween gender and race in these texts. This article sees one of O’Brien’s most importantfictions, Going After Cacciato (1978), an anti-war novel, as his project to de-gender theAmerican colonial masculinity perspectives on the war. The novel is set during the war inVietnam. It is told from the point of view of an American soldier, Paul Berlin. Cacciato, oneof Berlin's squadmates, goes absent without leave to walk from Vietnam to Paris. The noveldescribes Berlin's imagined chase of Cacciato across Eurasia. Berlin’s two worlds, real andunreal, match each other in the way he looks at Asian women in particular, and Asian worldin general because they are both reflect the colonial masculine perspective.