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Notable events involving Grou include:

19 Apr 1944
Around 1000B/19, the light cruiser HMS Diadem (Capt. E.G.A. Clifford, RN, flying the flag of Rear-Admiral R.R. McGrigor, CB, DSO, RN), escort carriers HMS Activity (Capt. G. Willoughby, RN), HMS Fencer (A/Capt. W.W.R. Bentinck, OBE, RN), destroyers HMS Milne (Capt. M. Richmond, DSO, OBE, RN), HMS Marne (Lt.Cdr. P.A.R. Withers, DSO, RN), HMS Matchless (Lt.Cdr. E.N. Walmsley, DSC and Bar, RN), HMS Meteor (Lt.Cdr. D.J.B. Jewitt, RN), HMS Musketeer (Cdr. R.L. Fisher, OBE, DSC, RN), HMS Ulysses (Lt.Cdr. R.J. Hanson, DSO, DSC, RN), HMS Verulam (Lt.Cdr. W.S. Thomas, DSC, RN), HMS Virago (Lt.Cdr. A.J.R. White, RN), HMS Inconstant (Lt.Cdr J.H. Eaden, DSC and Bar, RN), HMS Keppel (Cdr. I.J. Tyson, DSC, RD, RNR), HMS Walker (Lt.Cdr. A.N. Rowell, RN), HMS Westcott (Cdr.(Retd.) H. Lambton, RN), HMS Whitehall (Lt.Cdr. P.J. Cowell, DSC, RN), HMS Wrestler (Lt.Cdr. R.W.B. Lacon, DSC, RN) and the frigates HMCS Cape Breton (T/Lt.Cdr. A.M. McLarnon, RCNR), HMCS Grou (T/A/Lt.Cdr. H.G. Dupont, RCNR), HMCS Outremont (T/A/Lt.Cdr. H. Freeland, DSO, RCNR) and HMCS Waskesiu (Lt.Cdr. J.P. Fraser, RCNR) departed Scapa Flow for the Kola Inlet. The troop transport Nea Hellas (British, 16991 GRT, built 1922) was also with them.

On 20 April 1944, the destroyers HMS Beagle (Lt.Cdr. N.R. Murch, RN) and HMS Boadicea (Lt.Cdr. F.W. Hawkins, RN) joined coming from Skaalefjord, Faeroer Islands. On the same day the Nea Hellas had to be detached to return to Scapa Flow due to defects.

In the late evening of 23 April 1944, the force arrived in the Kola Inlet.

(1)

28 Apr 1944

Convoy RA 59 / Operation FZ.

This convoy departed the Kola Inlet on 28 April 1944. The passage of this convoy to the U.K. was known as Operation FZ.

The convoy was made up of the following merchant vessels; Andrew Carnegie (American, 7176 GRT, 1942), Arunah S. Abell (American, 7176 GRT, 1943), Benjamin H. Latrobe (American, 7176 GRT, 1942), Benjamin Schlesinger (American, 7176 GRT, 1944), Charles Henderson (American, 7176 GRT, 1943), Dolabella (British (tanker), 8142 GRT, built 1939), Edward P. Alexander (American, 7201 GRT, 1942), Fort Brule (British, 7133 GRT, built 1942), Fort Columbia (British, 7155 GRT, built 1942), Fort Hall (British, 7157 GRT, built 1943), Fort Kullyspell (British, 7190 GRT, built 1943), Fort Yukon (British, 7153 GRT, built 1943), Francis Scott Key (American, 7191 GRT, 1941), Francis Vigo (American, 7176 GRT, 1943), George Gale (American, 7176 GRT, 1942), George M. Cohan (American, 7176 GRT, 1943), George T. Angell (American, 7176 GRT, 1944), Gilbert Stuart (American, 7176 GRT, 1943), Grace Abbott (American, 7191 GRT, 1942), Hawkins Fudske (American, 7176 GRT, 1943), Henry Villard (American, 7176 GRT, 1942), James Smith (American, 7181 GRT, 1942), John B. Lennon (American, 7198 GRT, 1943), John Carver (American, 7176 GRT, 1942), John Davenport (American, 7176 GRT, 1942), John McDonogh (American, 7176 GRT, 1943), John T. Holt (American, 7176 GRT, 1943), Joseph N. Licollet (American, 7176 GRT, 1943), Joshua Thomas (American, 7176 GRT, 1943), Joyce Kilmer (American, 7176 GRT, 1943), Julien Poydras (American, 7176 GRT, 1943), Lapland (British, 2897 GRT, built 1942), Morris Hillquit (American, 7210 GRT, 1944), Nicholas Biddle (American, 7191 GRT, 1943), Noreg (Norwegian (tanker), 7605 GRT, built 1931), Pierre S. DuPont (American, 7176 GRT, 1942), Robert Eden (American, 7176 GRT, 1943), Thomas Sim Lee (American, 7191 GRT, 1942), Townsend Harris (American, 7176 GRT, 1943), William D. Byron (American, 7210 GRT, 1943), William Matson (American, 7176 GRT, 1943), William McKinley (American, 7200 GRT, 1943), William Moultrie (American, 7177 GRT, 1942), William Pepper (American, 7176 GRT, 1943) and William S. Thayer (American, 7176 GRT, 1943).

On departure from the Kola Inlet the convoy was escorted by the light cruiser HMS Diadem (Capt. E.G.A. Clifford, RN, flying the flag of Rear-Admiral R.R. McGrigor, CB, DSO, RN), escort carriers HMS Activity (Capt. G. Willoughby, RN), HMS Fencer (A/Capt. W.W.R. Bentinck, OBE, RN), destroyers HMS Milne (Capt. M. Richmond, DSO, OBE, RN), HMS Marne (Lt.Cdr. P.A.R. Withers, DSO, RN), HMS Matchless (Lt.Cdr. E.N. Walmsley, DSC and Bar, RN), HMS Meteor (Lt.Cdr. D.J.B. Jewitt, RN), HMS Musketeer (Cdr. R.L. Fisher, OBE, DSC, RN), HMS Ulysses (Lt.Cdr. R.J. Hanson, DSO, DSC, RN), HMS Verulam (Lt.Cdr. W.S. Thomas, DSC, RN), HMS Virago (Lt.Cdr. A.J.R. White, RN), HMS Inconstant (Lt.Cdr J.H. Eaden, DSC and Bar, RN), HMS Beagle (Lt.Cdr. N.R. Murch, RN), HMS Boadicea (Lt.Cdr. F.W. Hawkins, RN), HMS Keppel (Cdr. I.J. Tyson, DSC, RD, RNR), HMS Walker (Lt.Cdr. A.N. Rowell, RN), HMS Westcott (Cdr.(Retd.) H. Lambton, RN), HMS Whitehall (Lt.Cdr. P.J. Cowell, DSC, RN), HMS Wrestler (Lt.Cdr. R.W.B. Lacon, DSC, RN), frigates HMCS Cape Breton (T/Lt.Cdr. A.M. McLarnon, RCNR), HMCS Grou (T/A/Lt.Cdr. H.G. Dupont, RCNR), HMCS Outremont (T/A/Lt.Cdr. H. Freeland, DSO, RCNR) and HMCS Waskesiu (Lt.Cdr. J.P. Fraser, RCNR) and the corvette HMS Lotus (Lt. C.S. Thomas, RNR).

The Russian destroyers Gremyashchiy, Razyarenniy, minesweepers T 112, T 114, T 119 and the patrol vessels BO 201, BO 204, BO 205, BO 207, BO 209 and BO 212 were also with the convoy but later returned.

Not long after departure the convoy was sighted by the German air reconnaissance. The German U-boats U-277, U-278, U-307, U-313, U-315, U-354, U-387, U-636, U-674, U-711, U-739 and U-959 were waiting for the convoy in two patrol lines.

Around 0015B/30, U-739 was attack with gunfire and subsequently depth charges while trying to close the convoy.

Around 1956B/30, the William S. Thayer was torpedoed and sunk by U-307 which was subsequently depth charged by HMS Milne and HMS Beagle but escaped without damage.

Around 2013B/30, U-636 was depth charged by HMS Boadicea and sustained damage resulting in her being forced to abandon her patrol.

Around 2124B/30, U-387 fired a T-5 torpedo at one of the escorts but it did not hit the target.

Around 2138B/30, U-387 fired another T-5 torpedo at one of the escort but it did not hit the target. Following this attack she was depth charged by HMCS Waskesiu but escaped without damage.

Around 2156B/30, a Swordfish aircraft ('F' from 842 Squadron FAA, from HMS Fencer) tried to attack U-315 but was driven off by AA fire.

Around 2206B/30, U-711 fired a T-5 torpedo at one of the escorts but it did not hit the target.

Around 2212B/30, U-711 fired a torpedo at one of the merchant vessels but it did not hit the target.

Around 2245B/30, U-387 fired another T-5 torpedo at one of the escorts but it did not hit the target.

Around 2347B/30, U-387 fired another T-5 torpedo at one of the escorts but it did not hit the target.

Around 0013B/1, U-711 attacked the convoy with one torpedoes which missed.

Around 0041B/1, U-387 attacked the convoy with two torpedoes which both missed.

Around 0247B/1, U-277 was sunk by a Swordfish aircraft ('C' from 842 Squadron FAA, from HMS Fencer) in position 73°24'N, 15°32'E.

Around 0404B/1, U-387 was detected and attacked by a Swordfish aircraft ('H' from 842 Squadron FAA, from HMS Fencer). The submarine was not damaged by the two bombs that were dropped by the aircraft.

Around 0445B/1, U-354 was detected and attacked by a Swordfish aircraft ('F' from 819 Squadron FAA, from HMS Activity). The submarine made a crash dive and escaped undamaged.

Around 0947B/1, U-278 fired a torpedo at one of the merchant vessels but it did not hit the target.

Around 1140B/1, a Wildcat fighter from HMS Activity (from 833 Squadron FAA) shot down a German BV 138 reconnaissance aircraft.

Around 1206B/1, U-278 fired another T-5 torpedo at two of the escorts but it did not hit either of them. Following this attack she was depth charged by HMCS Cape Breton during which some damage was sustained.

Around 1640B/1, U-307 fired a T-5 torpedo at one of the escorts but it did not hit the target.

Around 1715B/1, U-307 was detected and depth charged by HMCS Cape Breton and HMCS Outremont. She was able to escape undamaged.

Around 2230B/1, U-307 fired a T-5 torpedo at one of the escorts but it did not hit the target.

Around 2330B/1, U-307 was detected and depth charged by HMS Westcott and HMS Wrestler. She was able to escape undamaged.

On 1 May 1944, U-959, which was lost the following day, reported having made two torpedo attacks with T-5 torpedoes on escort vessels which both missed.

Around 0247B/2, U-674 was sunk with rockets by a Swordfish aircraft ('B' from 842 Squadron FAA, from HMS Fencer) in position 70°32'N, 04°37'E.

Around 1030B/2, U-307 fired a T-5 torpedo at one of the escorts but it did not hit the target.

Around 1137B/2, U-387 was detected and attacked by a Swordfish aircraft ('A' from 842 Squadron FAA, from HMS Fencer). The submarine was not damaged by the bombs / depth charges that were dropped by the aircraft.

Around 1351B/2, U-711 fired a T-5 torpedo at one of the escorts but it did not hit the target.

Around 1645B/2, U-959 was sunk by depth charges from a Swordfish aircraft ('K' from 842 Squadron FAA, from HMS Fencer) in position 69°20'N, 00°20'W.

Around 1753B/2, U-307 was detected and attacked by a Swordfish aircraft ('H' from 842 Squadron FAA, from HMS Fencer). The submarine was not damaged by the rockets hat were fired by the aircraft. Shortly afterwards U-307 was depth charged by one of the escorts but she was again not damaged.

Around 0332/3, U-278 was detected and attacked by two Swordfish and one Wildcat aircraft (all from 842 Squadron FAA, from HMS Fencer). She shot down the Wildcat and was then able to escape through crash diving.

Around 0811B/3, U-387 was detected and attacked by a Swordfish aircraft ('G' from 842 Squadron FAA, from HMS Fencer). The submarine was not damaged by the six rockets hat were fired by the aircraft.

Around 1100B/3, U-387 was detected and attacked by a Swordfish aircraft ('G' from 842 Squadron FAA, from HMS Fencer). The submarine was not damaged by the six rockets that were fired by the aircraft.

Around 1100B/3, U-711 was detected and attacked by a Swordfish aircraft ('K' from 842 Squadron FAA, from HMS Fencer). The aircraft was driven off by AA fire from the U-boat.

Around 1124B/3, U-711 was detected at periscope depth and attacked by a Swordfish aircraft ('B' from 842 Squadron FAA, from HMS Fencer). The submarine was not damaged by the two rockets that were fired by the aircraft.

Around 2230B/3, HMS Fencer, with Russian and American naval personnel on board, parted company to proceed to the Clyde. She was escorted by HMS Walker, HMS Whitehall and HMS Boadicea. They arrived at Greenock around around 1900B/5.

At the same time HMS Diadem, with American naval personnel on board, parted company to proceed to the Scapa Flow. She was escorted by HMS Ulysses, HMS Verulam and HMS Virago. They arrived at Scapa Flow around 1500B/4.

Around 1300B/4, HMS Activity, with American naval personnel on board, parted company to proceed to the Scapa Flow. She was escorted by HMS Milne, HMS Marne, HMS Matchless, HMS Meteor and HMS Musketeer. They arrived at Scapa Flow around 0600B/5.

On 6 May 1944, the convoy split to proceed to several destinations on the west coast of the U.K. with most ships arriving at their destinations the following day.

Also on 6 May 1944, HMS Keppel, HMS Westcott, HMS Wrestler, HMS Beagle and HMS Inconstant were detached from the convoy and they arrived in the Clyde later the same day.

Also on 6 May 1944, HMCS Cape Breton, HMCS Grou, HMCS Outremont and HMCS Waskesiu were detached from the convoy and they arrived at Londonderry the following day.

28 Sep 1944

Operation Tenable.

Laying of air laid mines in Ramisoysund, Lepsoyrev, and Harhamsfjord.

The light cruiser HMS Euryalus (Capt. R. Oliver-Bellasis, RN), escort carriers HMS Fencer (A/Capt. W.W.R. Bentinck, OBE, RN), HMS Trumpeter (A/Capt. K.S. Colquhoun, RN) and the destroyers HMS Myngs (Capt. M.L. Power, CBE, RN), HMS Zambesi (Lt.Cdr. W. Scott, DSC and Bar, RN), HMS Savage (Lt.Cdr. C.W. Malins, DSO, DSC and Bar, RN), HMS Cambrian (Lt.Cdr. H.T. Harrel, RN), HMS Caprice (Lt.Cdr. G.W. McKendrick, RN) and HMS Cassandra (Cdr. P.F. Powlett, DSO and Bar, DSC, RN) departed Scapa Flow around 0800A/28.

The Force reached the operational area, but the operation had to be abandoned owing to the persistent bad weather conditions and the force returned to Scapa Flow around 1630A/5 after having conducted an A/S patrol for which the 6th Escort Group also joined. This group was at that moment made up of the frigates HMCS New Waterford (T/A/Cdr. W.E.S. Briggs, DSC, RCNR, Senior Officer of the 6th Escort Group), HMCS Annan (T/A/Lt.Cdr C.P. Balfry, RCNR), HMCS Cape Breton (T/Lt.Cdr. A.M. McLarnon, RCNR), HMCS Grou (T/Lt.Cdr. H.G. Dupont, RCNR), HMCS Outremont (T/Lt.Cdr. F.O. Gerity, RCNR) and HMCS Loch Achanalt (T/Lt. R.W. Hart, RCNVR). The 6th Escort Group did not return to Scapa Flow on the 5th though but remained at sea.

HMS Euryalus had already parted company around 0810A/2 to return to Scapa Flow where she arrived around 2345A/2. (2)

8 Dec 1944
HMS Vengeful (Lt. A.S. Melville-Ross, DSC, RN) conducted A/S exercises off Larne with HMCS Grou (Lt.Cdr. H.G. Dupont, RCNR) and HMCS Annan (T/A/Lt.Cdr C.P. Balfry, RCNR). (3)

9 Dec 1944
HMS Vengeful (Lt. A.S. Melville-Ross, DSC, RN) conducted A/S exercises off Larne with HMCS Grou (Lt.Cdr. H.G. Dupont, RCNR), HMCS Annan (T/A/Lt.Cdr C.P. Balfry, RCNR), HMS Byard (A/Lt.Cdr. J.I. Jones, DSO, DSC, RNR), HMS Calder (T/A/Lt.Cdr. E. Playne, DSC, RNVR) and HMS Drury (Lt.Cdr. N.J. Parker, RN). (3)

4 Mar 1945
HMCS Grou (Lt.Cdr. H.G. Dupont, RCNR) begins a refit at Dartmouth, Nova Scotia, Canada.

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