Military organizations often emphasize the importance of loyalty. It has been suggested that loyalty enhances motivation to take great risks and strive to accomplish a mission. However, research into what influences loyalty among military personnel is scarce. Hence, the aim of this study was to examine how leadership and social identity fusion relate to loyalty, using data from a sample consisting of a Swedish military unit on a United Nation mission (N = 152) in Mali. Hierarchical multiple regression results generally showed that social identity fusion and leadership were positively related to a willingness to show loyalty to the closest workgroup, one’s own unit, and the mission. The findings indicate that leadership and high levels of social identity fusion may influence the willingness to be loyal to organizational goals. The practical implication of this study is increased knowledge about the importance of leadership and social identity in developing relevant loyalties.