Although much has been written to explain a superpower’s rationale when deciding to engage in a military intervention, not enough research has been conducted to analyze why their allies choose to support such foreign policy decisions. By combining an international relations perspective of military interventions with a social psychology understanding of Psychological Distance, part of Construal Level Theory, and with the field of mathematics, this study develops a new theory to explain why and when junior allies choose to support a superpower’s military intervention.