 On the morning of 27 June the 9th MAB launched their amphibious feint against the Cua Viet, reversing course when 7km from shore.On 28 June the South Vietnamese advance began and quickly ran into strong PAVN resistance and helicopter assaults were launched to land troops behind PAVN positions.On 29 June, following preparatory airstrikes the 1st and 4th Vietnamese Marine Battalions were landed by U.S. Marine helicopter squadrons HMM-164 and HMM-165 near the Wunder Beach area.