Final answer:
The reference information provided does not mention the year the William Beaumont Army Medical Center was established. Instead, it highlights the history of military medical care and developments in hospital construction legislation, such as the Hill Burton Act of 1946.
Step-by-step explanation:
The question pertaining to the year when the hospital became William Beaumont Army Medical Center does not seem to be directly answerable with the given reference information, as none of the provided passages specifically mention the hospital by that name or its transition into an army medical center. However, the history of healthcare and hospitals during wartime is evident in the provided passages, indicating the evolution of military medical care over time.
Among the historical accounts included, there are mentions of Canadian General Hospitals in France during World War I, the development of the Contraband Hospital in Washington, D.C. during the Civil War, and the influence of federal legislation on hospital construction and expansion in the United States post-World War II, specifically the Hospital Survey and Construction Act or Hill Burton Act of 1946.
While these pieces of information offer insight into military and public health history, none directly address the establishment year of William Beaumont Army Medical Center. Thus, for details specifically about this medical center, one may have to explore other historical sources or archives that are dedicated to the history of that institution.