Hear the roar of cannon fire at “Heavy Thunder: Artillery and Infantry Program” at the Bentonville Battlefield State Historic Site Saturday, Aug. 19 from 10 a.m. until 4 p.m. Learn how cannons were loaded and fired during the Civil War. See how infantry maneuvered in the field. Re-enactors will portray infantrymen and artillerymen to show what life was life for a Civil War soldier. Firing demonstrations and historical discussions will occur throughout the day. Concessions will be available, including The DogFather Hot Dog Joint. For more information, call 919-594-0789.