Military sociology is a subfield within sociology. It corresponds closely to C. Wright Mills's summons to connect the individual world to broader social structures. Military sociology aims toward the systematic study of the military as a social group rather than as a military organization. This highly specialized sub-discipline examines issues related to service personnel as a distinct group with coerced collective action based on shared interests linked to survival in vocation and combat, with purposes and values that are more defined and narrow than within civil society. Military sociology also concerns civil-military relations and interactions between other groups or governmental agencies. Military sociology reflects the diversity of methods employed by sociology itself. These include large-scale data analysis, participant observation, social network analysis, survey research, comparative history, case studies etc. The methods of military sociology also include philosophical perspectives and arguments. Contemporary military sociology is primarily a result of the World War II and Cold War. These events initiated the systematic study of military sociology, though it stands to reason that the relationship between the military and society would predate these events. The dismantling of the Soviet Union, the trauma of the terrorist attack on 11 September 2001 and the subsequent wars in Afghanistan and Iraq also dramatically affected the field of military sociology. There are numerous topics within military sociology, and it is important to note that its scope is not exclusively limited to the military institution itself or to its members. Rather, military sociology encompasses areas such as civilian-military relations and the relationship between the military and other military groups or governmental agencies.