The United States Army considers itself descended from the Continental Army, and dates its institutional inception from the origin of that armed force in 1775. As a uniformed military service, the Army is part of the Department of the Army, which is one of the three military departments of the Department of Defense.
Pure risk, also known as absolute risk, is insurable. Speculative Risk: Three possible outcomes exist in speculative risk: something good (gain), something bad (loss) or nothing (staying even). Gambling and investing in the stock market are two examples of speculative risks.
Relative risk. In statistics and epidemiology, relative risk or risk ratio (RR) is the ratio of the probability of an event occurring (for example, developing a disease, being injured) in an exposed group to the probability of the event occurring in a comparison, non-exposed group.