The Army's Training Support System (TSS) is based on an analysis of the training capabilities required to develop and sustain an expeditionary land force for conducting operations within the Common Operating Environment. The TSS encompasses the capabilities required to enable an operationally relevant training environment which is networked, integrated, and interoperable using analysis of new warfighting capabilities and operational capability trends on training support in the Army. The intent is to ensure a robust, persistent capability that provides the full spectrum of training whenever and wherever needed. This paper will describe the framework of the TSS components and supporting subcomponents and capabilities. This structure provides a rigorous and exhaustive description of 1) the product lines that define the related families of training systems, 2) the architectures and standards that enable interoperability and networking, and 3) the business processes in management, evaluation, and resources that produce these capabilities. The paper will also discuss the implications that DoD Training Transformation (T2) capabilities will have on the Army TSS, such as how the TSS must be extensible and integrated into the emerging T2 training capabilities. This will also enable the "gap and seam" approach that JNTC uses for identifying vertical and horizontal Joint training deficiencies and redundancies to the area of training support. Finally, this paper provides a description of not only how the T2 capabilities will affect TSS design, but also provides suggestions on how T2 could benefit from the fundamental analysis on which the TSS is built.