Building 2300 of the 452nd Air Mobility Detachment at March Air Reserve Base in Riverside, California occupies a significant place in the history of American military medicine and also in the darker legacy of medical treatment of tuberculosis during the mid-twentieth century. March Air Reserve Base itself originated as a military aviation facility during the early twentieth century, expanding dramatically during World War II as the United States mobilized for global conflict and required extensive military infrastructure throughout the nation. The base's location in southern California made it strategically important for military aviation training and operations throughout the war and subsequent Cold War period. Building 2300 served multiple military purposes across its long operational history, but its most significant and tragic role involved medical facilities, particularly a tuberculosis ward dedicated to treating soldiers who had contracted the disease during military service. The tuberculosis ward represented an attempt to provide specialized medical care for military personnel afflicted with a disease that remained largely incurable and usually fatal during the mid-twentieth century, despite advances in public health and sanitation. The treatment protocols of the era emphasized rest cure, isolation, and exposure to fresh air and sunlight, approaches that offered comfort but not cure to patients suffering from progressive pulmonary disease. Patients admitted to the tuberculosis ward faced the grim reality that they had contracted a disease whose trajectory was typically progressive decline leading to death, and many soldiers spent months or years in the facility knowing that their condition was likely to be fatal. The tuberculosis ward thus functioned as both a hospital and a repository of suffering and loss, a space where young men confronted terminal illness far from home and family. The lower levels of Building 2300 housed a military morgue facility, where the bodies of deceased military personnel, including those who died from tuberculosis and other causes, were temporarily stored and processed for disposition to families or burial at military cemeteries. The presence of death facilities in close proximity to the tuberculosis ward created a particularly oppressive environment, where patients could not avoid awareness that their disease would likely terminate in death, and where the dead were processed in basement spaces beneath the living. The double function of the building, housing both the living dying from tuberculosis and the dead in the morgue below, created an environment of profound death awareness and existential darkness. Children and young service members were among those treated in the tuberculosis ward, adding dimensions of tragedy related to youthful death and loss of potential. The cumulative effect of the building's functions created an environment saturated with death, disease, suffering, and loss, conditions that appear to have generated intense paranormal phenomena. Building 2300 has become widely recognized within paranormal research circles as one of the most actively and consistently haunted locations at March Air Force Base, with paranormal investigators documenting extraordinary levels of activity and complexity. The paranormal phenomena manifest with particular intensity in specific areas, particularly concentrated in and around the former tuberculosis ward and the glass door areas that separated isolation spaces from circulation areas. A small female voice of unclear age but apparently childlike in character has been documented in EVP and audio recordings, calling out names and speaking in ways that suggest either a young patient or a child service member's child who may have been present at the facility. Children's voices, giggling, and the sounds of young people playing or singing have been documented in paranormal audio recordings, contradicting the facility's grim historical function and suggesting the presence of youthful spirits engaged in innocent play. Adult voices murmuring and speaking have been recorded without any identifiable physical source for the sounds. The glass door separating the tuberculosis isolation ward from other areas exhibits dramatic poltergeist phenomena, opening and closing repeatedly despite being secured, locked, or physically held in place. The door exhibits purposeful behavior, opening and closing in patterns that appear responsive to human presence and activity, suggesting an intelligent entity deliberately controlling the door's movement. Paranormal investigators using sophisticated equipment have documented energy orbs concentrated particularly in the tuberculosis ward and morgue areas, appearing in photographs with unusual frequency and in patterns that suggest directed movement and purposeful activity. Electronic interference affects sensitive equipment brought into the building, with recording devices malfunctioning, battery depletion occurring at accelerated rates, and electromagnetic anomalies detected throughout the structure. EVP recordings have yielded substantial paranormal audio evidence, including voices of children talking, singing, and playing, along with adult voices speaking in medical terminology or discussing medical conditions consistent with tuberculosis treatment. The cumulative effect of phenomena at Building 2300 creates one of the strongest concentrations of paranormal activity documented at any active military installation, suggesting that the building's history of death, disease, and suffering has created conditions favorable to persistent spiritual manifestation and that multiple distinct entities inhabit the structure, each with particular connection to the building's tragic functions.