Sergeant John J O'Brien was assigned to the US Army.
John received the Distinguished Service Cross (DSC)
Served during World War I
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The contained information on John J O'Brien is gathered and extracted from military records from a variety of sources. This material in no way represents this serviceman's complete military record; we welcome additional material. If you can help add to Sergeant John O'Brien's military record please contact us. This can include award citations and photos. . .
DSC
World War I, 1917-1918
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