<p>The 1900s and 1910s were a prime era for the growth and empowerment of cadet corps within Australia. Private schools in particular sought to build on a newfound spirit of nationalism following the Federation of the colonies in 1901 by harnessing enthusiasm for the nation and British Empire, and by cultivating a martial culture among their predominantly middle-class students. The principal tool harnessed in that cultivation were the school cadet corps, and the most visible symbol of those corps were their uniforms. By focussing on the cadet corps in the private schools of Sydney during this era, this article will explore the emphasis placed on cadet corps uniforms and argue that uniforms were the central element used cultivate a sense of identity and <i>esprit de corps</i>. When considered within the context of broader cadet corps activities, this will further demonstrate the power of uniforms as an instrument of cultural inculcation.</p>