effective 1 september 1957, the division artillery reorganized under the pentomic or reorganization of the airborne division (rotad) organization. to support each of the five new battle groups in the division, the division artillery had a separate batteries of five 105mm howitzers that reported directly to the division artillery without intermediate battalions. the division artillery's five 105mm howitzer batteries were designated as batteries a, b and c of the 319th artillery and batteries d and e of the 320th artillery. when battery c, 319th artillery accompanied the 2nd airborne battle group, 503rd infantry to okinawa in 1960, battery c, 320th artillery was activated to replace it in the division artillery. to provide general support and nuclear fires, battery b, 377th artillery manned four honest john (later little john) rocket launchers. the pentomic division artillery, with only 25 105mm howitzers, was a significant reduction in combat power. partly due to this lack of firepower, the pentomic organization lasted only until 1964.