You will be given a definition of a task first, then some input of the task.
Generate a correct and concise answer for the question based on the words in the context.

Context : George W. McIver (February 22, 1858 -- May 9, 1947) was a United States Army Brigadier General who served as acting Chief of the Militia Bureau and commanded the 161st Infantry Brigade in World War I.
Question : Which armed forces did George W. McIver serve?
Output:
United States Army