You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
This probably has been discussed already in great detail but what happens if the Army of Northern Virginia wins at Gettysburg by taking Missionary Ridge? I think that a likely target would have been Camp Curtin. It was a major Union supply depot and would have allowed the Confederacy a chance to get foreign intervention in the war on their side by demonstrating that the Confederates could inflict a major defeat on the Union.