 | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (September 2021) |
| Action of 15 October 1917 | |||||||
|---|---|---|---|---|---|---|---|
| Part of World War I, Atlantic U-boat Campaign | |||||||
.JPG) The destroyer USS Cassin. | |||||||
| |||||||
| Belligerents | |||||||
 United States |
 German Empire | ||||||
| Commanders and leaders | |||||||
|
W. N. Vernou |
 Victor Dieckmann | ||||||
| Strength | |||||||
| Destroyer USS Cassin | Submarine U-61 | ||||||
| Casualties and losses | |||||||
|
One killed Nine wounded Cassin damaged | U-61 damaged | ||||||
The action of 15 October 1917 was a naval engagement of World War I between Imperial Germany and the United States off the coast of Mine Head, Ireland.