Bentonville Battlefield State Historic Site soon will commemorate the 159th anniversary of the Battle of Bentonville with a day of historic demonstrations, activities, and informative presentations.The event, “Always on Duty,” Saturday, March 16, from 10 a.m.-4 p.m., will highlight the experiences of medical providers during the Civil War, including surgeons, stewards, and nurses. Visitors can learn more about the battle and what life was like for soldiers and civilians during the Civil War. The event is free.