Johann Mohr

Korvettenkapitän (Crew 34)

27 ships sunk, total tonnage 129,976 GRT
2 warships sunk, total tonnage 5,775 tons
3 ships damaged, total tonnage 26,167 GRT

Born  12 Jun 1916 Hannover
Died  2 Apr 1943(26)Middle Atlantic

Kapitänleutnant Johann Mohr wearing his Knights Cross.


8 Apr 1934 Offiziersanwärter
26 Sep 1934 Seekadett
1 Jul 1935 Fähnrich zur See
1 Jan 1937 Oberfähnrich zur See
1 Apr 1937 Leutnant zur See
1 Apr 1939 Oberleutnant zur See
1 Sep 1941 Kapitänleutnant
1 Apr 1943 Korvettenkapitän


29 Nov 1939 Iron Cross 2nd Class
4 May 1941 Iron Cross 1st Class
4 May 1941 U-boat War Badge 1939
27 Mar 1942 Knights Cross
13 Jan 1943 Knights Cross with Oak Leaves

U-boat Commands

U-124 8 Sep 1941 2 Apr 1943  (+)  6 patrols (268 days) 

Jochen <a href=Mohr" border="2" />
The lucky Kapitänleutnant 'Jochen' Mohr after a patrol.

'Jochen' Mohr was one of a handful of U-boat officers who spent their entire U-boat careers on a single boat. He completed his first three patrols on U-124 under the command of Kapitänleutnant Georg-Wilhelm Schulz before taking her over on 8 Sep 1941.

Mohr achieved notable success against enemy warships. On his first patrol as commander in November 1941, he sank the British light cruiser HMS Dunedin and in 1942 the French corvette Mimosa. The night of 12 May 1942 was also notable: U-124 sank four ships with a total of 21,784 tons from convoy ONS 92. In all, he sank 29 ships in his 18 months as commander of U-124.

A doggerel composed by Mohr on his way back from the US East Coast:

The moon night is as black as ink
Off Hatteras the tankers sink
While sadly Roosevelt counts the score
some fifty thousand tons. Mohr

Mohr was killed when U-124 was sunk with all hands on 2 April 1943 west of Oporto, Portugal by the British corvette HMS Stonecrop and the British sloop HMS Black Swan. (Niestlé, 1998).


Busch, R. and Röll, H-J. (1999). German U-boat commanders of World War II.
Busch, R. and Röll, H-J. (1997). Der U-Bootkrieg 1939-1945 (Band 2).
Niestlé, A. (1998). German U-boat losses during World War II.
Rohwer, J. (1998). Axis Submarine Successes of World War Two.

Patrol info for Johann Mohr

 U-boat Departure Arrival  
1. U-124 16 Sep 1941  Lorient  1 Oct 1941  Lorient  Patrol 1,16 days
2. U-124 30 Oct 1941  Lorient  29 Dec 1941  Lorient  Patrol 2,61 days
3. U-124 21 Feb 1942  Lorient  10 Apr 1942  Lorient  Patrol 3,49 days
4. U-124 4 May 1942  Lorient  26 Jun 1942  Lorient  Patrol 4,54 days
5. U-124 25 Nov 1942  Lorient  13 Feb 1943  Lorient  Patrol 5,81 days
6. U-124 27 Mar 1943  Lorient  2 Apr 1943  Sunk  Patrol 6,7 days
6 patrols, 268 days at sea

Ships hit by Johann Mohr

Date U-boat Name of ship Tons Nat. Convoy
20 Sep 1941U-124 Baltallinn1,303brOG-74
20 Sep 1941U-124 Empire Moat2,922brOG-74
25 Sep 1941U-124 Empire Stream2,922brHG-73
26 Sep 1941U-124 Cortes1,374brHG-73
26 Sep 1941U-124 Petrel1,354brHG-73
26 Sep 1941U-124 Siremalm2,468nwHG-73
24 Nov 1941U-124 HMS Dunedin (D 93)4,850br
3 Dec 1941U-124 Sagadahoc6,275am
14 Mar 1942U-124 British Resource7,209br
17 Mar 1942U-124 Ceiba1,698ho
17 Mar 1942U-124 Acme (d.)6,878am
18 Mar 1942U-124 Kassandra Louloudis5,106gr
18 Mar 1942U-124 E.M. Clark9,647am
19 Mar 1942U-124 Papoose5,939am
19 Mar 1942U-124 W.E. Hutton7,076am
21 Mar 1942U-124 Esso Nashville (d.)7,934am
21 Mar 1942U-124 Atlantic Sun (d.)11,355am
23 Mar 1942U-124 Naeco5,373am
12 May 1942U-124 Empire Dell7,065brONS-92
12 May 1942U-124 Llanover4,959brONS-92
12 May 1942U-124 Mount Parnes4,371grONS-92
12 May 1942U-124 Cristales5,389brONS-92
9 Jun 1942U-124 FFL Mimosa (K 11)925frONS-100
12 Jun 1942U-124 Dartford4,093brONS-100
18 Jun 1942U-124 Seattle Spirit5,627amONS-102
28 Dec 1942U-124 Treworlas4,692br
9 Jan 1943U-124 Broad Arrow7,718amTB-1
9 Jan 1943U-124 Birmingham City6,194amTB-1
9 Jan 1943U-124 Collingsworth5,101amTB-1
9 Jan 1943U-124 Minotaur4,554amTB-1
2 Apr 1943U-124 Gogra5,190brOS-45
2 Apr 1943U-124 Katha4,357brOS-45

29 ships sunk (135,751 tons) and 3 ships damaged (26,167 tons).

We have a picture of this vessel.
(d.) means the ship was damaged.

About ranks and decorations
Ranks shown in italics are our database inserts based on the rank dates of his crew comrades. The officers of each crew would normally have progressed through the lower ranks at the same rate.

Media links

U-Boat Attack Logs

Daniel Morgan and Bruce Taylor
(£ 38.25)

German U-boat Commanders of World War II

Busch, Rainer and Röll, Hans-Joachim

Naval Officers Under Hitler

Rust, Eric C.

Listing of all U-boat commanders

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