Combat may take place under a certain set of rules or be unregulated. Examples of rules include the Geneva Conventions (covering the treatment of soldiers in war), medieval Chivalry, and the Marquess of Queensberry rules (covering boxing).
Death is the permanent end of the life of a biological organism. Death may refer to the end of life as either an event or condition Many factors can cause or contribute to an organism's death, including predation, disease, habitat destruction, senescence, malnutrition and accidents. The principal causes of death in developed countries are diseases related to aging.Traditions and beliefs related to death are an important part of human culture, and central to many religions. In medicine, biological details and definitions of death have become increasingly complicated as technology advances.