HMS Gladiolus was a Flower-class corvette of the Royal Navy, the first ship of her class.
OB 293 was a North Atlantic convoy which ran during the battle of the Atlantic in World War II. It was notable for seeing the loss to the Kriegsmarine (KM) of U-47, with her commander KL Günther Prien, the person responsible for the sinking of HMS Royal Oak two years previously.
Convoy SC 42 was the 42nd of the numbered series of World War II Slow Convoys of merchant ships from Sydney, Cape Breton Island to Liverpool. SC 42 was attacked over a three night period in September 1941, losing 16 ships sunk and 4 damaged. This was the worst Allied loss following the attack on convoy SC 7 the previous year. Two attacking U-boats were destroyed.
Convoy SL 125 was the 125th of the numbered series of World War II SL convoys of merchant ships from Sierra Leone to Liverpool. Ships carrying commodities bound to the British Isles from South America, Africa, and the Indian Ocean travelled independently to Freetown, Sierra Leone, to be convoyed for the last leg of their voyage. Thirty-seven merchant ships departed Freetown on 16 October 1942 and were joined at sea by five more.
HX 72 was a North Atlantic convoy of the HX series which ran during the battle of the Atlantic in World War II. The convoy comprised 43 ships of which 11 were sunk and another damaged by German U-boats who suffered no losses.
HX 237 was a North Atlantic convoy of the HX series which ran during the Battle of the Atlantic in World War II. It was one of several convoy battles that occurred during the crisis month of May 1943.
Convoy ON 113 was a trade convoy of merchant ships during the second World War. It was the 113th of the numbered series of ON convoys Outbound from the British Isles to North America. The ships departed Liverpool on 17 July 1942 and were joined on 18 July by Mid-Ocean Escort Force Group C-2. They were found on 24 July by the eleven U-boats of Wolf pack Wolf. Five ships were sunk before the convoy reached Halifax, Nova Scotia on 31 July.
Convoy SC 19 was the 19th of the numbered series of World War II Slow Convoys of merchant ships from Sydney, Cape Breton Island to Liverpool. The trade convoy left Halifax, Nova Scotia on 12 January 1941 and was found by U-boats of the 7th U-boat Flotilla on 29 January. Seven ships were sunk before the convoy reached Liverpool on 2 February.
Convoy HX 133 was the 133rd of the numbered series of World War II HX convoys of merchant ships from HalifaX to Liverpool. The ships departed Halifax on 16 June 1941, and were found on 23 June by U-boats of the 1st U-boat Flotilla, operating out of Brest, France. U-boats sank six ships before the convoy reached Liverpool on 3 July. There was strong criticism of the RCN corvette's signalling capabilities as borne out by the number of collisions that occurred.
Convoy HX 126 was the 126th of the numbered series of World War II HX convoys of merchant ships from HalifaX to Liverpool.
Convoy OG 71 was a trade convoy of merchant ships during the second World War. It was the 71st of the numbered OG convoys Outbound from the British Isles to Gibraltar. The convoy departed Liverpool on 13 August 1941 and was found on 17 August by a Focke-Wulf Fw 200 Condor of Kampfgeschwader 40. Starting on August 19, it became the first convoy of the war to be attacked by a German submarine wolfpack, when reached by eight U-boats from 1st U-boat Flotilla, operating out of Brest. Ten ships comprising a total tonnage of 15,185 tons were sunk before the U-boats lost contact on 23 August.
Convoy HX 231 was the 231st of the numbered series of Second World War HX convoys of merchant ships from HalifaX to Liverpool. The ships departed New York City on 25 March 1943 and were met on 31 March by Mid-Ocean Escort Force Group B-7. The convoy was found on 4 April and attacked by eleven U-boats of the 1st, 3rd, 6th and 10th U-boat flotillas, operating out of Brest, La Rochelle, St Nazaire and Lorient, respectively. These U-boats formed the wolfpack Löwenherz (Lionheart). The U-boats sank six ships before losing contact on 7 April. Two U-boats, U-632 and U-635, were sunk. Surviving ships from the convoy reached Liverpool on 10 April.
Convoy ON 92 was a trade convoy of merchant ships during the Second World War. It was the 92nd of the numbered series of ON convoys Outbound from the British Isles to North America. The ships departed from Liverpool on 6 May 1942 and were joined on 7 May by Mid-Ocean Escort Force Group A-3.
Convoy OG 69 was a trade convoy of merchant ships during the second World War. It was the 69th of the numbered OG convoys Outbound from the British Isles to Gibraltar. The convoy departed Liverpool on 20 July 1941 and was found on 25 July by Focke-Wulf Fw 200 Condors of Kampfgeschwader 40. Nine ships were sunk by submarine attacks continuing through 30 July.
Convoy SC 100 was a North Atlantic convoy, one of the SC series which ran during the battle of the Atlantic in World War II. It was the 100th of the numbered series of slow convoys of merchant ships from Sydney, Cape Breton Island to Liverpool. It came under attack, one of several convoy battles that occurred during the autumn and winter of 1942, losing five ships.
Convoy ON 115 was a trade convoy of 43 merchant ships with 12 escort ships during the Second World War. The convoy departed Liverpool on 24 July 1942 and arrived at Boston on 8 August. Three ships were lost to U-boats during the crossing and two were damaged.
Convoy ON-153 was the 153rd of the numbered series of ON convoys of merchant ships Outbound from the British Isles to North America. The World War II convoy departed Liverpool on 11 December 1942 and was met on 12 December by Mid-Ocean Escort Force Group B-7. Two merchant ships and the escort group leader were sunk in a North Atlantic battle with U-boat Wolf pack Raufbold before reaching the Western Ocean Meeting Point (WOMP) where the Western Local Escort Force assumed responsibility for the convoy on 23 December. Surviving ships reached New York City on 31 December.
Convoy HX 47 was a North Atlantic convoy of the HX series which ran during the battle of the Atlantic in World War II. It was the 47th of the numbered series of merchant convoys run by the Allies from Halifax to Liverpool. The convoy was attacked by German U-boats and lost three of its 58 ships.
Convoy HX 49 was a North Atlantic convoy of the HX series which ran during the Battle of the Atlantic in World War II. It was the 49th of the numbered series of merchant convoys run by the Allies from Halifax to Liverpool. The convoy was attacked by German U-boats, losing three of its 50 ships sunk. Another ship was lost after dispersal.
SS Tregarthen was a cargo steamship that was built in Scotland for the Hain Steam Ship Co in 1936. She was sunk with all hands by a U-boat in 1941 in the Battle of the Atlantic.
Kriegsmarine 
Royal Canadian Navy 
