The U.S. military is at high risk for tobacco use, particularly during the first year of military service. Technical Training follows an 8 1/2 week tobacco ban during Basic Military Training and is a vulnerable time for personnel to both re-initiate and initiate tobacco use. Thus, this can be a crucial time to promote tobacco policies and interventions. However, there is limited research examining when, how, and where personnel access tobacco during the first year of service, particularly among users of newer products (e.g., electronic cigarettes). Thus, the purpose of the current study is to explore the timing, source, and location of tobacco use during Technical Training across all types of products. Further, this study will examine differences in demographic characteristics and prior tobacco history in relationship to these tobacco behaviors.