15th Maine Infantry

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Note: Only six companies of the 15th Maine,  (Cos. A, C, D, F, G, K), under Colonel Isaac Dyer, were ever located at the Siege of Petersburg.  The other 4 companies (Cos. B, E, H, I) under Lieutenant Colonel Murray were with the portion of the XIX Corps which defended Washington, D.C. and pursued Early’s forces.

Muster In: Organized at Augusta December 6-31, 1861, and mustered in January 23, 1862.¹
Muster Out: Mustered out July 5, 1866.²

Commander(s):
Colonel Isaac Dyer?
³

Commander 2
Commander Image

Commander 3
Commander Image

First Offensive Order of Battle:

• Not present at the Siege of Petersburg.⁴
• Weapons: Enfield Rifles (.577 caliber) (June 30, 1864)⁵

Second Offensive Order of Battle:

• Not present at the Siege of Petersburg.⁶
• Weapons: Enfield Rifles (.577 caliber) (June 30, 1864)⁷

Third Offensive Order of Battle: Second Brigade | First Division | XIX Corps | Union Army (July 18-27, 1864)⁸,⁹,¹⁰

• Commander: Colonel Isaac Dyer (July 18, 1864)(also mentioned as being in command of portion of 2/1/XIX that was at Bermuda Hundred, at least on July 26. Brigade commander McMillan was present at Bermuda Hundred on July 26 also, but apparently wasn’t in command in the field.)¹¹,¹²,¹³
• Unit Strength:
• Weapons:
• Note: A detachment of the 15th Maine, composed of six companies (Cos. A, C, D, F, G, K), ¹⁴,¹⁵,¹⁶,¹⁷

Fourth Offensive Order of Battle:

• Not present at the Siege of Petersburg.¹⁸

Fifth Offensive Order of Battle:

• Not present at the Siege of Petersburg.¹⁹
• Weapons: Enfield Rifles (.577 caliber) (September 30, 1864)²⁰

Sixth Offensive Order of Battle:

• Not present at the Siege of Petersburg.²¹

Seventh Offensive Order of Battle:

• Not present at the Siege of Petersburg.²²

Eighth Offensive Order of Battle:

• Not present at the Siege of Petersburg.²³

Ninth Offensive Order of Battle:

• Not present at the Siege of Petersburg.²⁴

Dyer’s/Sifakis’ Compendium Info:
Siege of Petersburg Battles²⁵:

• Cos. A, C, D, F, G, K took the steamer Exact, leaving New Orleans on July 5.²⁶
• Moved to Fort Monroe, thence to Bermuda Hundred, Va., July 1-17 (6 Cos.).
• Arrived at Fort Monroe at midnight on the night of July 16-17.²⁷
• Arrived at Bermuda Hundred on the afternoon of July 18.²⁸,²⁹
• Left Bermuda Hundred on July 27.³⁰
• Duty in trenches at Bermuda Hundred until July 28. [Dyer appears to be incorrect.]
• Deep Bottom July 28-30. [Dyer appears to be incorrect.]
• Moved to Washington, D.C., thence to Monocacy, Md.
• (4 Cos., under Murray and Drew, moved from Morganza to Washington, D.C., July 1-12. Pursuit of Early July 14-24. Rejoin Regiment at Monocacy, Md., August 4.)

Bibliography:

Siege of Petersburg Documents Which Mention This Unit:

Sources: