General George B. McClellan

General George B. McClellan was a prominent Union general during the American Civil War, known for his organizational skills and leadership in early campaigns. He commanded the Army of the Potomac, but his cautious nature led to missed opportunities against Confederate forces. His notable engagement was the Battle of Antietam in 1862, which ended in a strategic stalemate but provided President Lincoln the political leverage needed to issue the Emancipation Proclamation. McClellan later ran for president in 1864 but was defeated by Lincoln, ultimately leaving a complex legacy of military leadership and political involvement.