May 1775 
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| Date | Battle | State | Reference | |||||||||||
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| 5/4 - 5/1775 | off Castle William Island, Boston Harbor HM Sloop Otter |
MA | NDAR, v1, p. 278, 283 | |||||||||||
| 5/5/1775 | Martha's Vineyard | MA | ||||||||||||
| 5/5/1775 | Bedford HM Sloop Falcon | MA | NDAR, v1, p. 303 | |||||||||||
| 5/10/1775 | Fort Ticonderoga   |
NY | Boatner | |||||||||||
| 5/10/1775 | Skenesboro Capture of schooner Liberty |
NY | Boatner NDAR, v1, p. 312 |
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| 5/10/1775 | Falmouth HMS Canceaux | ME | NDAR, v1, p. 302 | |||||||||||
| 5/11/1775 | Savannah, powder seized | GA | Morrill | |||||||||||
| 5/12/1775 | Crown Point |
NY | Boatner | |||||||||||
| 5/12/1775 | Elizabeth Islands HM Sloop Falcon | MA | NDAR, v1, p. 322 | |||||||||||
| 5/14 - 17/1775 | Fort St. John, Capture of Sloop Enterprise  |
QU | Boatner NDAR, v1, p. 358 |
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| 5/15/1775 | off Castle William Island, Boston Harbor HM Sloop Otter |
MA | NDAR, v1, p. 339 | |||||||||||
| 5/18/1775 | Fort St. John | QU | NDAR, v1, p. 358 | |||||||||||
| 5/20/1775 | Charlotte Town  |
NC | ||||||||||||
| 5/21/1775 | Grape Island |
MA | Siege of Boston | |||||||||||
| 5/27/1775 | Noddle's Island (Battle of Chelsea Creek) |
MA | NDAR, v1, p. 544, 545, 546, 551, 584 Siege of Boston Bixby |
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| 5/27/1775 | Hogg Island |
MA | NDAR, ditto Siege of Boston |
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| 5/29/1775 | Portsmouth Harbor HMS Scarborough |
NH | NDAR, v1, p. 593 | |||||||||||
| 5/30/1775 | Noddles Island, Boston Harbor HMS Preston |
MA | NDAR, v1, p. 569 | |||||||||||
| 5/30/1775 | Fort William & Mary, Portsmouth HMS Scarborough |
NH | NDAR, v1, p. 593 | |||||||||||
| 5/31/1775 | Peddock's (Pettick's) Island |
MA | NDAR, v1, p. 630 Siege of Boston |
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| 5/31/1775 | Noddle Island, Boston Harbor | MA | NDAR, v1, p. 575 Siege of Boston |
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