[Dr. Sivana]

No report that I can find anywhere as to what the message actually says.

The article states that it describes German military maneuvers. They don't go into details, so I guess the maneuvers are still classified.

[Repeal The 17th]

https://globalnews.ca/news/7451275/carrier-pigeon-message-100-years-old-france/
“Platoon Potthof receives fire as they reach the western border of the parade ground, platoon Potthof takes up fire and retreats after a while,” the message reads in part. “In Fechtwald half a platoon was disabled. Platoon Potthof retreats with heavy losses.”