Convoy SC 121
| Convoy SC 121 | |||||||
|---|---|---|---|---|---|---|---|
| Part of Battle of the Atlantic | |||||||
 A depth charge being loaded onto a depth-charge thrower aboard the corvette HMS Dianthus | |||||||
| |||||||
| Belligerents | |||||||
 United Kingdom United States Canada |
 Germany | ||||||
| Commanders and leaders | |||||||
|
Capt. H.C. Birnie RNR† Capt. P.R. Heineman USN | Admiral Karl Dönitz | ||||||
| Strength | |||||||
|
69 freighters 2 destroyers 3 cutters 4 corvettes | 27 submarines[1] | ||||||
| Casualties and losses | |||||||
|
12 freighters sunk (55,673 GRT) 270 killed/drowned | none | ||||||