A voluntary association is defined as a group of individuals who enter into an agreement as volunteers to form a body (or organization) to accomplish a purpose. There are a few important specific uses of the term in SMS.
Originating in Praetonia, these associations are also now common in Questers and North Point. Their purpose was originally to provide an armed militia to defend the lives and property of their members. Today they have often taken on the task of providing complete military force to defend their localities, and often confederate to provide forces that can exert exercise armed force on a global scale.