<P> In World War II, the Brazilian Clube Militar (Military Club) and the Casino da Urca adopted the concepts of the U.S. service banner by giving posters to the family members of the Brazilian Expeditionary Force . On these posters the phrase Daqui saiu um Expedicionário was written, which means "From here came an Expeditionary". Although the design differs from the U.S. banners, the mothers of the Brazilian soldiers also received a pin prominently featuring a blue star similar to U.S. pins . </P> <P> The individuals entitled to display the service flag are officially defined in 36 U.S.C. § 901 which reads: </P> <P> A service flag approved by the Secretary of Defense may be displayed in a window of the place of residence of individuals who are members of the immediate family of an individual serving in the Armed Forces of the United States during any period of war or hostilities in which the Armed Forces of the United States are engaged . </P> <P> The U.S. Code also discusses the wearing of lapel pins . </P>

When do you display a blue star flag