What did Robert E. Lee want and why?

Lee wants to invade North Lee decided to invade the North at Sharpsburg, Maryland (Antietam) because he believed that a victory on Union soil would help win support for the South in Europe and turn the northern public opinion against the war.

Lee sought to build on his success by taking the war across the Potomac River into the United States. Lee's bold maneuvering ended when he retreated from Maryland following the Battle of Antietam on September 17, 1862, ...