on 28 april , tan son nhut air base ( lying adjacent to the airport ) came Getting under artillery fire and attack Attack from vietnamese people 's air force aircraft .

although unable to deter Hindering vietnam from cambodia , china succeeded in demonstrating Protest that its cold war communist adversary , the soviet union , was unable to protect Defending its vietnamese ally .

on 2 january 1967 , the united states air force launched Process_start operation Military_operation bolo with the aim of luring north vietnamese mig fighters into an air battle , where they could be destroyed Destroying in an ambush Attack .

stung by that devastating Destroying defeat , the north vietnamese air force grounded their fighter force several times between june and august 1967 , in order to work on their training and tactics .

on 23 august 1967 , the north vietnamese air force employed Using their newly devised tactic against a u.s. strike formation , while it was conducting Action raids Attack against a rail yard .

the operation saw Self_motion heavy fighting Hostile_encounter between the 1st australian task force ( 1 atf ) and north vietnamese army and viet cong during the wider fighting around long binh and bien hoa .