In 1940, as France faced a military defeat during World War II, a series of bureaucratic decisions led to a devastating humanitarian crisis. The French government, under German occupation, prioritized food and supply distribution for the general population, but psychiatric hospitals were excluded from these efforts. In the Oise department, a region near the front lines and heavily affected by the war, this exclusion resulted in severe suffering for around 1,500 patients. These individuals, already confined in mental health institutions, faced worsening conditions due to a lack of food and essential supplies. On a national level, the impact of this policy was even more severe. Approximately 45,000 mentally ill individuals died of malnutrition in French psychiatric hospitals during the war. This outcome was not the result of a single decision, but rather a combination of administrative choices that left mental health patients outside the system meant to support the broader population. Psychiatric hospitals relied on supplies allocated by local authorities, but they were given the lowest priority due to their lack of political influence, geographical isolation, and the social stigma surrounding mental illness. The situation in Oise was particularly dire. Located close to the front and under direct German control, the region experienced additional demands on its resources. Local authorities, already overwhelmed by the war's impact, did not raise alarms about the crisis in psychiatric hospitals with the urgency it required. This failure to act contributed to the high mortality rate among patients. The number of deaths—45,000—reflects a systemic neglect rather than an intentional plan, highlighting how vulnerable groups can be overlooked during times of crisis. Despite the scale of this tragedy, it has largely been omitted from French history education and official commemorations. Several factors have contributed to this silence, including the lack of surviving family members to advocate for the victims, the stigma associated with mental illness, and the difficulty of integrating this event into the broader narrative of national resistance and suffering during the war. Recognizing this episode raises important questions about how societies treat their most vulnerable members in times of crisis and the responsibility of institutions to ensure equitable care even in the face of adversity.