Abstract: A containerized expeditionary system that can be expanded from a compact, container sized unit to significantly increase the interior space, thereby allowing for use as a shelter, laundry, office, restroom, etc., or combinations therein. The system has a body with a pair of end walls, a pair of side walls, a floor, and a roof defining an interior space. A set of doors can be opened to allow a series of panels pivotally coupled to the body to be moved from a stowed configuration into a deployed configuration where the panels extend out of body to form an enclosure defining a second interior space that combines with the first interior space. The panels are positioned in the ends of the container to maximize the internal space so that the container can include all of the necessary equipment to provide the desired functionality at a location.