From Wikipedia, the free encyclopedia. Military branch (also service branch or armed service) is according to common standard the subdivision of the national armed forces of a sovereign nation or state. In classical terminology, the three basic military branches are the Army, Air Force, and Navy. Army. Air Force.
Health factors in the County Health Rankings represent what influences the health of a county. We measure four types of health factors: health behaviors, clinical care, social and economic, and physical environment factors. In turn, each of these factors is based on several measures. A fifth set of factors that influence health (genetics and biology) is not included in the Rankings. Alcohol & Drug Use.
Many factors contribute to mental health problems, including: 1  Biological factors, such as genes, physical illness, injury, or brain chemistry. 2  Life experiences, such as trauma or a history of abuse. 3  Family history of mental health problems.