"Circuit layout chart of the area belonging to the 3rd Army Corps. The chart shows the long distance telephone and telegraph lines, as well as the civil-military systems in place. This chart was issued by the Office of the Chief Signal Officer, 3rd Army in Germany during World War One."

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Size: 8523px × 5763px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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