The encounter led to Causation significant changes Change in American tactics and training Education_teaching , and a return to dog-fighting in air combat doctrine .

The battlefield Hostile_encounter and logistical constraints limited Limiting the applicability of conventional Allied doctrine of manoeuvre and firepower .

The sack did not ultimately alter Change the balance of power , which was slowly shifting Change in Byzantium 's favour , but it thoroughly discredited Judgment_communication the theological doctrine of Iconoclasm , ardently supported Supporting by Theophilos .

Võ Nguyên Giáp , however , used Using efficient and novel tactics of direct fire artillery , convoy Patrolling ambushes and massed anti-aircraft guns to impede land and air supply Supply deliveries together with a strategy based on recruiting a sizable regular army facilitated Cause_to_make_progress by wide popular support Supporting , a guerrilla warfare doctrine and instruction developed Coming_to_be in China , and the use Using of simple and reliable war material provided Supply by the Soviet Union .

The key advance made by the Europeans was an effective combined arms doctrine in which the infantry and artillery , supported Supporting by the cavalry , cooperated Collaboration together to be triply effective .

The Army of the Republic of Vietnam ( ARVN ) expanded Expansion following a period of neglect after Tet , modeled on US doctrine .