[Fig.] Lincoln's pocket watch is found to contain a secret message from 150 years ago during the American Civil War

According to foreign media reports, during the American Civil War from 1861 to 1865, Abraham Lincoln led the Northern Federation to defeat the Southern Confederacy and maintained the unity of the United States. His pocket watch became a witness to this conflict. What no one expected was that, in addition to playing the role of a witness, Lincoln's pocket watch also had a hidden secret - the bronze face was engraved with war information.