 I-6 was sunk in a collision with the freighter TOYOKAWA MARU on 16 June 1944

After the completion of the Tinian campaign, "William C. Miller" departed that island on 21 August in company with .The destroyer escort paused briefly at Eniwetok, in the Marshalls, on the 24th before she pushed on for the Hawaiian Islands, arriving at Pearl Harbor on 2 September.