section_path: Organization/Personnel and units/Rank and role
section_name: Rank and role
paragraph_text: Rank and role
  
  The military organization is characterized by a command hierarchy divided by military rank, with ranks normally grouped (in descending order of authority) as officers (e.g. colonel), non-commissioned officers (e.g. sergeant), and personnel at the lowest rank (e.g. private). While senior officers make strategic decisions, subordinated military personnel (soldiers, sailors, marines, or airmen) fulfil them. Although rank titles vary by military branch and country, the rank hierarchy is common to all state armed forces worldwide.
  
  In addition to their rank, personnel occupy one of many trade roles, which are often grouped according to the nature of the role's military tasks on combat operations: combat roles (e.g. infantry), combat support roles (e.g. combat engineers), and combat service support roles (e.g. logistical support).