 Finally, the ARVN attacked the PAVN-occupied bunkers with TOW missiles and M-202 rockets, breaking the PAVN defense and forcing the remaining defenders to flee the base.The fighting at An Lộc demonstrated the continued ARVN dependence on U.S. air power and U.S. advisors.For the PAVN, it demonstrated their logistical constraints; following each attack, resupply times caused lengthy delays in their ability to properly defend their position.