On 6 June 1944, "Caperton" sortied from Majuro for the Marianas operation, which culminated in the fury of the Battle of the Philippine Sea on 19 and 20 June. Screening the American carriers as they launched the strikes which would cripple Japanese naval aviation, "Caperton" interposed her blazing antiaircraft fire between enemy air attacks and the carriers. Moving on to cover the attacks preparatory to the return of United States forces to Guam, "Caperton" sailed close inshore to provide lifeguard services for carrier strikes, and on 25 June braved the fire of enemy shore batteries to shell and sink a cargo ship in Apra Harbor. Through July, she operated in the Marianas, and late in the month screened air strikes on Yap and Palau.