Following his enrollment in Maine for Civil War military service, Edward P. Tobie, Jr. officially mustered in for duty as a sergeant with Company G of the 1st Maine Volunteer Cavalry. He then participated with his regiment in a number of the Union Army's most important engagements of the war, including 1862's First Battle of Winchester (May 25) and battles of Cedar Mountain (August 9), Second Bull Run (August 28–30), South Mountain (September 14), Antietam (September 17), and Fredericksburg (December 11–15); 1863's Stoneman's Raid, Battle of Brandy Station (June 9), during which he was taken prisoner after being wounded, and the battles of Gettysburg (July 1–3), and Mine Run (November 7 to December 2); and 1864's battles of Todd's Tavern (May 7), Haw's Shop (May 28), Old Church (May 30), Cold Harbor (May 31 to June 12), Trevilian Station (June 11–12), St. Mary's Church (June 24), &lt;a href="Battle%20of%20Deep%20Bottom%20I"&gt;Deep Bottom I/Gravel Hill&lt;/a&gt; (July 27–29), Ream's Station II (August 25), and Boydton Plank Road (October 27–28).