PHILADELPHIA (AP) - At the 150th anniversary celebration of the Battle of Gettysburg, many Civil War re-enactors will eschew the use of modern technology, but scores of tourists will embrace it.

PHILADELPHIA (AP) At the 150th anniversary celebration of the Battle of Gettysburg, many Civil War re-enactors will eschew the use of modern technology, but scores of tourists will embrace it.

More than 5,700 Foursquare users have checked in at sites in the historic borough, and more than 16,000 Facebook users have liked it. In the weeks leading up to the anniversary July 1-3, apps that offer maps and information about key battle spots have surged in popularity.

Garry Adelman has been a licensed Gettysburg battlefield guide for 19 years and recently moved his high-energy tour to smartphones.

The project was initiated four years ago by the Civil War Trust, a nonprofit battlefield preservation group where Adelman is the director of history and education.

He says it helps tell the story to a new generation.