One slight correction - they were upset about the proposed tariff on cotton being sent to the textile mills in New England. They were already being tariffed to

One slight correction - they were upset about the proposed tariff on cotton being sent to the textile mills in New England. They were already being tariffed to hell and back on every product they produced that was shipped overseas while non-slave state producers were excluded from the same export tariffs. Gen. Lee was also at Gettysburg because he hoped to catch hold of the major railway depot in Harrisburg that was being used by the Union to supply the entire war effort east of Missouri, Milton Hershey's new chocolate factory, and of course, the shoe factory.