During June and July, "Jones" acted as escort ship for Mediterranean convoys and took part in training for the invasion of Southern France. She departed Naples 13 August in convoy with French and British ships for the invasion, arriving 3 days later. The destroyer not only provided gunfire support missions during the assault, but also acted as electronic jamming vessel in the successful attempt to prevent radio-controlled bombs from harassing the area. In the weeks that followed she continued to range up and down the coast in support of the First Airborne Task Force destroying bridges, gun emplacements, railroad facilities and coastal vessels. She was attacked by a German E-boat 21 August, but destroyed the craft with gunfire. For her outstanding record during this period the ship received the Navy Unit Commendation.