7th Maine Volunteer Infantry Regiment The 7th Regiment Maine Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War . It participated in most of the campaigns and battles of the Army of the Potomac in the Eastern Theater . Service . The 7th Maine was organized at Augusta , Maine , and mustered into Federal service for a three - year enlistment on August 21 , 1861 . After organization and training , the regiment left the state for Baltimore , Maryland , on August 23 . Subsequently , it was attached to Dix ' s Division and assigned to duty in the city until October 25 , 1861 . The 7th was then assigned to Davidson ' s Brigade , W . F . Smith ' s Division , Army of the Potomac , until March 1862 . It moved to Washington , D . C . and was on duty at Georgetown Heights until November 7 . From there , the 7th camped at Lewinsville , Virginia , until March 1862 . It was then part of the brigade ' s advance on Manassas , Virginia , from March 10 – 15 . The regiment was then assigned to the 3rd Brigade , 2nd Division , 4th Army Corps , Army of the Potomac , to May 1862 . It subsequently returned to Alexandria , Virginia , and thence moved to Fort Monroe on March 23 – 24 . It took part in the brigade ' s reconnaissance to Watt ' s Creek from March 27 – 31 . The 7th was reassigned to the 3rd Brigade , 2nd Division , 6th Army Corps . In the spring and early summer of 1862 , the regiment participated in Maj . Gen . George B . McClellan ' s Peninsula Campaign . Specific engagements included the following : With the end of the unsuccessful campaign , the 7th remained stationary at Harrison ' s Landing until August 15 , when it moved to Fort Monroe . Subsequently , it was stationed at Centreville , Virginia , until August 31 . Although it did not directly participate in the Second Battle of Manassas , the 7th assisted in checking Pope ' s rout at Bull Run on August 30 and covered the army ' s retreat to Fairfax Court House on September 1 . The 7th then took part in McClellan ' s Maryland Campaign that September and October , seeing action in the Battle of Crampton ' s Gap on South Mountain on September 14 . It also was present for the Battle of Antietam on September 17 . Their ranks thinned by the almost continuous campaigning , the 7th Maine was ordered home to recruit fresh troops in October . It remained in Portland , Maine , until January 21 , 1863 , when it was transported back to Northern Virginia . The 7th joined its brigade and division at White Oak Church on January 25 . It then took part in the operations at Franklin ' s Crossing from April 29 - May 2 during the Chancellorsville Campaign . It was part of the successful attack on Maryes Heights during the Second Battle of Fredericksburg on May 3 and the fight at Salem Church on May 3 – 4 . The 7th participated in the great Battle of Gettysburg on July 2 – 4 , and engaged the Confederates several times during their subsequent retreat to Virginia ( actions were at Fairfield July 5 and near Funkstown , Maryland , on July 10 – 13 ) . During the autumn , the regiment was involved in the Bristoe Campaign from October 9 – 22 and the Battle of Rappahannock Station on November 7 . It then participated in the Mine Run Campaign from November 26 - December 2 . After spending the winter stationary in its camp in Virginia , the 7th was part of Ulysses S . Grant ' s Overland Campaign from the Rapidan River to the James River between May 3 - June 15 , 1864 . it fought in the Battle of the Wilderness May 5 – 7 ; Spotsylvania May 8 – 12 ( including attacking the " Bloody Angle " on May 12 ) . It was then part of the action along the North Anna River May 23 – 26 and was on the Federal line along the Pamunkey from May 26 – 28 . Other actions included Totopotomoy May 28 – 31 , Cold Harbor June 1 – 12 , and the Siege of Petersburg from June 17 - July 9 , as well as the Battle of Jerusalem Plank Road on June 22 – 23 . The Maine boys then moved to Washington , D . C . , July 9 – 11 and helped repulse Jubal A . Early ' s attack on Washington on July 11 – 12 . They were then a part of Philip H . Sheridan ' s Shenandoah Valley Campaign from August 7 – 21 . The regiment was mustered out at Charlestown , Virginia , on August 21 , 1864 . The veterans whose enlistments had not yet expired and the recent recruits were transferred to the 1st Maine Veteran Infantry . Those men whose term was over returned home to Maine via train . Total strength and casualties . 1 , 505 men served in the 7th Maine Infantry Regiment at one point or another during its service . Of these . 152 were killed in action or died of their wounds ; 403 men were wounded ; another 212 died of various diseases while in the service , and 19 men perished in Confederate prisoner - of - war camp s .