The graves of Jewish soldiers marked with the Star of David since September 18, 1919

"The graves of Jewish soldiers who died in France will be marked with the Mogen David, "Star of David," according to an announcement made yesterday by Colonel Harry Cutler, Chairman of the Jewish Welfare Board"...

Source: nytimes

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Notes: 

1. Dear reader. if you are subscribe to the New York Times please send me the article

2. "1927, Star of David Markers  JWV [Jewish War Veterans] was successful in securing passage of legislation requiring the American Battlefield Monument Commission to place Star of David Markers on the graves of Jewish soldiers buried in war cemeteries in France. Heretofore, the markers were Christian crosses. A decade later, JWV members were appointed to the commission".

Source:

http://www.jwv.org/images/uploads/Jewish%20War%20Veterans%20Timeline.pdf