An Army medic from Marshfield has died in Afghanistan, after he was attacked by insurgents. The Pentagon confirms that 27-year-old Staff Sergeant Joseph Altmann died on Christmas Day, just a few days after his own birthday. Officials say he was hit by small-arms fire. His family says this is Altmann’s third tour of duty; he previously served in Iraq, and had recently enlisted for another four years in the Army. His parents are John and Janice Altmann. Their son was a medic whose unit was based out of Hawaii. Altmann had no children; he just got married in February of this year.