Found in 1944

While entrenching in defense of the Soviet Bagration Offensive of 1944:

“On that road, 132 years before, the Grande Armée had moved on Moscow. Not far from there is the source of the Beresina at Stujanka, the site of the historic battlefield. During the entrenching work at that time a Napoleonic eagle had been found. They had immediately sent it to the Fuehrer’s headquarters. The parallels with the Napoleonic retreat were borne in on us in a shattering way.”

— Armin Scheiderbauer, Adventures in My Youth: A German Soldier on the Eastern Front 1941-45, 2006.