The Service Star Flag, also known as "blue star banners, was designed in 1917 by U.S. Army Captain Robert L. Queisser, in honor of his two sons who were serving in World War I. It was immediately adopted by the public and by government officials and the flag quickly became the unofficial symbol of a child in service.
The flag is authorized by the Department of Defense for display by families who have members serving in the Armed Forces during any period of war or hostilities the United States may be engaged in for the duration of such hostilities. Homes and organizations may display banners in their front window to indicate the number of members of the
family or organization serving in the Armed Forces.