"Berkeley" continued to screen "Ticonderoga" throughout that summer. On 2 August, she provided anti-air protection to the task group during air strikes against North Vietnamese missile boats during the Tonkin Gulf incident. After American warships reported more attacks on 4 August, the guided missile destroyer again screened the carrier during extensive retaliatory strikes on North Vietnamese gunboats and torpedo boats on 5 August. "Berkeley" remained in the South China Sea during the relative lull that followed, patrolling the region during the slow buildup of American naval forces in Southeast Asia. The warship joined the aircraft carrier while there and sailed for home on 10 October, mooring at Long Beach, via Yokosuka, Japan, on 21 November.