Action of 15 October 1917
| Action of 15 October 1917 | |||||||
|---|---|---|---|---|---|---|---|
| Part of World War I, Atlantic U-boat Campaign | |||||||
| 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.