Next the force hit Marcus and Wake Islands (19 May–23 May) and then prepared for the Marianas campaign. On 6 June the carrier force sortied from Majuro again. From the 11th through the 17th its planes and ships ranged from the Volcano and Bonin Islands to the southernmost Marianas, supporting the assault on Saipan and preventing Japanese reinforcements from reaching that beleaguered island and the next target, Guam. On the 17th, after screening the carriers during flight operations for strikes against Saipan, Tinian, Rota, and Guam, "Miller" received word of a Japanese Fleet approaching from the Philippines. On the 18th she continued to cover the assault forces on Saipan while waiting for the expected engagement. On the 19th she was on the starboard quarter of as enemy dive bombers opened the Battle of the Philippine Sea. Throughout the 2-day battle, which tore the muscle from the Japanese naval air arm, she remained in that carrier's screen, splashing one enemy plane and damaging another.