Psychology and American History are utilized to develop an analysis of the group behavior of Americans during wartime. Incorporated into this examination of group behavior was the influence of the Presidents’s birth order and how his family structure affected his wartime decisions. The following issues are addressed concerning the Presidents who were involved in warfare during their tenure of office. Can family group interactions be a factor in decisions embraced by the Executive leader? Does the desire for acceptance by others create emotionally based decisions, and affect the Nation’s attitudes during wartime? What does history tell us about a country’s collective mindset during wartime? Are people’s behaviors basically the same regardless of the time period? Will this introspection of human behavior have any influence on how you perceive present day conflicts and leadership? Are you an independent thinker and decision-maker or is it more comfortable to follow the security of the crowd?