Summary/Abstract: This article aims to shed light on the Portuguese army’s medical organization and action during World War One, and will be divided into three chapters. The first one presents a global context about Portuguese belligerency and how the Health Service worked during the war. The second chapter, describes the Service’s organization as well as its inherent difficulties to provide support to the troops in the operational theatre. In the third chapter, one can find a state of the art about the theme in study, specifically comprised of a panoply of texts and books written about health issues related to Portuguese belligerency in World War One.
