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![John James Oltmanns, Assistant in the Coast Survey, assimilated rank of major inthe Union Army during the Civil War pers0084.jpg John James Oltmanns, Assistant in the Coast Survey, assimilated rank of major inthe Union Army during the Civil War](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_pers0084.jpg?itok=FkKeCVEp)
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John James Oltmanns, Assistant in the Coast Survey, assimilated rank of major inthe Union Army during the Civil War. Served on staff to General William B.Franklin during the Red River Campaign, with Sheridan at Cedar Hill, and earlyin the war with Porter on the Mississippi River. Wounded on a reconnaissance of the Pearl River, he died 5 years after the war from complications.
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NOAA People