Simplify the following text for a Grade 9 native English-speaking person.
Original: Shortly after the Battle of Gettysburg , with the support of Pennsylvania Governor Andrew Curtin , the site was purchased and Union dead were moved from shallow and inadequate burial sites on the battlefield to the cemetery .
Simplified: The Union dead were moved from shallow ( not deep ) burial places on the battlefield to the cemetery . It was supported by Pennsylvania Governor Andrew Curtin .