15 Oct, 1944
With her trials and initial training completed USS Blenny (Lt.Cdr. W.H. Hazzerd) arrives at Pearl Harbour from New London.

10 Nov, 1944
USS Blenny (Lt.Cdr. W.H. Hazzerd) departs Pearl Harbour for her 1st war patrol. She is ordered to patrol in the South China Sea.

14 Dec, 1944
While operating in the South China Sea USS Blenny (Lt.Cdr. W.H. Hazzerd) sinks the Japanese guardboat Taisho Maru No.5 (47 GRT) with gunfire in position 16º27'N, 119º43'E and torpedoes and sinks the Japanese corvette Kaibokan No.28 (740 tons) about 100 nautical miles north-west of Manila, Philippines in position 15º50'N, 119º45'E. (see map)

23 Dec, 1944
USS Blenny (Lt.Cdr. W.H. Hazzerd) torpedoes and sinks the Japanese merchant tanker Kenzui Maru (4156 GRT) off San Fernando in position 16º40'N, 120º16'E. (see map)

12 Jan, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) ends her 1st war patrol at Fremantle, Australia.

4 Feb, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) departs Fremantle for her 2nd war patrol. She is ordered to patrol in the South China Sea off the coast of French Indo-China.

27 Feb, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) torpedoes and sinks the Japanese merchant tanker Amato Maru (10238 GRT) off Cape Padaran, French Indo-China in position 11º58'N, 109º18'E. (see map)

25 Mar, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) ends her 2nd war patrol at Subic Bay, Philippines.

16 Apr, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) departs Subic Bay for her 3rd war patrol. Once again she is ordered to patrol in the South China Sea.

25 May, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) sinks the Japanese guardboat Kairyu Maru (81 GRT) off the north coast of Java in position 06º04'S, 107º27'E. (see map)

30 May, 1945
While operating off the south coast of Borneo USS Blenny (Lt.Cdr. W.H. Hazzerd) sinks a Japanese tug with gunfire in position 03º40'S, 114º16'E and torpedoes and sinks the Japanese cargo ship Hokoku Maru (520 GRT) about 40 nautical miles south-west of Bandjermasin in position 04º09'S, 114º16'E. (see map)

9 Jun, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) ends her 3rd war patrol at Fremantle.

5 Jul, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) departs Fremantle for her 4th war patrol. She is ordered to patrol in the Java Sea.

11 Jul, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) sinks a Japanese tug with gunfire off Lombok Strait in position 08º40'S, 114º23'E. (see map)

16 Jul, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) torpedoes and sinks the Japanese gunboat Nankai (former Dutch minelayer Regulus, 2400 tons, offsite link) west of Surabaya, Java, Netherlands East Indies in position 05º26'S, 110º33'E. (see map)

14 Aug, 1945
USS Blenny (Lt.Cdr. W.H. Hazzerd) ends her 4th war patrol at Subic Bay.