Within a year of World War II’s end, the United States federal government passed the National Mental Health Act of 1946. This bill was the country’s first significant foray into the realm of psychological health. Many studies have examined the act and its legacy, including the creation of the National Institute of Mental Health. Fewer studies, however, have investigated the significant roles of veterans and veterans’ organizations in the passage of this legislation. This essay delves into these various roles and argues that veterans, from various professional backgrounds, united by creating strategic arguments to lobby for this act. Their motivations ranged from the desire to destigmatize mental health issues to discovering methods for the prevention and treatment of psychiatric problems among American society. Ultimately, these veterans helped the nation revolutionize its approach to mental health policy and paved the way for future servicemembers to take a stand and become political actors.