2 Jan, 1944
With her initial training completed USS Rock (Cdr. J.J. Flachsenhar) departs the Panama Canal Zone bound for Pearl Harbour.

8 Feb, 1944
USS Rock (Cdr. J.J. Flachsenhar) departs Pearl Harbour for her 1st war patrol. She is ordered to patrol off the Ryukyu Islands.

29 Feb, 1944
USS Rock (Cdr. J.J. Flachsenhar) is damaged by surface gunfire and depth charges off the Ryukyu Islands in position 25º33'N, 130º42'E and is forced to terminate her patrol. (see map)

13 Mar, 1944
USS Rock (Cdr. J.J. Flachsenhar) ends her 1st war patrol at Pearl Harbour.

4 Apr, 1944
USS Rock (Cdr. J.J. Flachsenhar) departs Pearl Harbour for her 2nd war patrol. She is ordered to patrol off Honshu in Japanese home waters.

28 May, 1944
USS Rock (Cdr. J.J. Flachsenhar) ends her 2nd war patrol at Majuro.

22 Jun, 1944
USS Rock (Cdr. J.J. Flachsenhar) departs Majuro for her 3rd war patrol. She is ordered to patrol in the Luzon Strait.

12 Aug, 1944
USS Rock (Cdr. J.J. Flachsenhar) ends her 3rd war patrol at Pearl Harbour.

9 Sep, 1944
USS Rock (Cdr. J.J. Flachsenhar) departs Pearl Harbour for her 4th war patrol. She is ordered to patrol in the South China Sea.

26 Oct, 1944
USS Rock (Cdr. J.J. Flachsenhar) torpedoes and sinks the Japanese merchant tanker Takasago Maru No.7 (834 GRT) near Balabac Strait in position 10º18'N, 117º47'E. (see map)

8 Nov, 1944
USS Rock (Cdr. J.J. Flachsenhar) ends her 4th war patrol at Fremantle, Australia.

14 Dec, 1944
USS Rock (Cdr. J.J. Flachsenhar) departs Fremantle for her 5th war patrol. She is ordered to patrol in the South China Sea.

14 Feb, 1945
USS Rock (Cdr. J.J. Flachsenhar) ends her 5th war patrol at Fremantle.

7 Mar, 1945
USS Rock (Cdr. R.A. Keating, Jr.) departs Fremantle for her 6th war patrol. She is ordered to patrol in the Luzon Strait.

9 Mar, 1945
USS Rock (Cdr. R.A. Keating, Jr.) picks up 15 survivors from the American merchant Peter Silvester that was torpedoed and sunk on 6 February by the German submarine U-862 south-west of Australia in position 34º19'S, 99º37'E.

29 Apr, 1945
USS Rock (Cdr. R.A. Keating, Jr.) ends her 6th war patrol at Saipan. She is now sent to the Hunters Point Navy Yard for a major overhaul.

14 May, 1945
USS Rock (Cdr. R.A. Keating, Jr.) arrives at the Hunters Point Navy Yard.

7 Aug, 1945
With her overhaul completed USS Rock (Lt.Cdr. T.M. Ustick) departs the US west coast boundfor Pearl Harbour.