15 Apr, 1944
With her trials and initial training completed USS Plaice (Lt.Cdr. C.B. Stevens) departs New London bound for Pearl Harbour.

13 May, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) arrives at Pearl Harbour.

3 Jun, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) departs Pearl Harbour for her 1st war patrol. She is ordered to patrol of the Bonin Islands.

8 Jun, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) toppes off with fuel at Midway.

30 Jun, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) torpedoes and sinks the Japanese auxiliary gunboat Hyakafuku Maru (986 GRT) north-west of Chichi Jima in position 28º20'N, 141º23'E. (see map)

5 Jul, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) torpedoes and sinks the Japanese auxiliary netlayer Kogi Maru (857 GRT) off Ototo Jima in position 27º43'N, 141º02'E. (see map)

18 Jul, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) torpedoes and sinks the Japanese submarine chaser Ch 50 (420 tons) about 200 nautical miles north-west of Chichi Jima in position 29º22'N, 139º14'E. (see map)

26 Jul, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) ends her 1st war patrol at Midway.

17 Aug, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) departs Midway for her 2nd war patrol. She is ordered to patrol off the Ryukyu Islands.

27 Sep, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) torpedoes and sinks the Japanese corvette Kaibokan No.10 (740 tons) about 100 nautical miles north-north-west of Amami o Shima in position 29º26'N, 128º50'E. (see map)

12 Oct, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) ends her 2nd war patrol at Pearl Harbour.

9 Nov, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) departs Pearl Harbour for her 3rd war patrol. She is ordered to patrol in Japanese home waters off Kyusyu and Sikoku.

13 Nov, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) toppes off with fuel at Midway. She departs the next day.

9 Dec, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) torpedoes and damages the Japanese escort destroyer Maki (1262 tons, offsite link) east of Kyusyu, Japan in position 31º57'N, 129º01'E. (see map)

20 Dec, 1944
USS Plaice (Lt.Cdr. C.B. Stevens) ends her 3rd war patrol at Guam.

23 Jan, 1945
USS Plaice (Cdr. C.B. Stevens) departs Saipan for her 4th war patrol. She is ordered to patrol in Luzon Strait.

23 Mar, 1945
USS Plaice (Cdr. C.B. Stevens) ends her 4th war patrol at Midway.

30 Mar, 1945
Cdr. R.S. Andrews takes over command from Cdr. C.B. Stevens.

26 Apr, 1945
USS Plaice (Cdr. R.S. Andrews) departs Midway for her 5th war patrol. She is ordered to patrol in the Sea of Okhotsk.

13 May, 1945
USS Plaice (Cdr. R.S. Andrews) sinks four small Japanese vessels with gunfire off the Kuril Islands in position 45º30'N, 147º04'E. Several other vessels were damaged. (see map)

13 Jun, 1945
USS Plaice (Cdr. R.S. Andrews) ends her 5th war patrol at Pearl Harbour.

18 Jul, 1945
USS Plaice (Cdr. R.S. Andrews) departs Pearl Harbour for her 6th war patrol. She is ordered to patrol in the East China Sea.

31 Jul, 1945
USS Plaice (Cdr. R.S. Andrews) toppes off with fuel at Saipan. She departs for her patrol area on August 2nd.

24 Aug, 1945
USS Plaice (Cdr. R.S. Andrews) ends her 6th war patrol at Midway.