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| James Allen | Army | Private | | South Mountain,Maryland | September 14, 1862 | Single-handed and slightly wounded he accosted a squad of 14 Confederate soldiers bearing the colors of the 16th Georgia Infantry (C.S.A.). |
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| Robert Anderson | Navy | Quartermaster | | On board the USS Crusader and theUSS Keokuk | 1863 | Served on board the USS Crusader and the USS Keokuk during various actions of those vessels. |
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| Augustus Barry | Army | Sergeant Major | | Unknown | 1863 – 1865 | Gallantry in various actions during the rebellion.[9] |
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| David L. Bass | Navy | Seaman | | Fort Fisher, North Carolina | January 15, 1865 | On board the U.S.S. Minnesota in action during the assault on Fort Fisher, 15 January 1865. |
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| William R. D. Blackwood | Army | Surgeon | | Petersburg, Virginia | April 2, 1865 | Removed severely wounded officers and soldiers from the field while under a heavy fire from the enemy, exposing himself beyond the call of duty, thus furnishing an example of most distinguished gallantry. |
| John Gregory Bourke | Army | Private | Company E, 15th Pennsylvania Cavalry | Murfreesboro, Tennessee | December 31, 1862 – January 2, 1863 | Gallantry in action.[10] |
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| James Brady | Army | Private | | Battle of Chaffin's Farm, Virginia | Sep 29, 1864 | Capture of flag[9] |
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| Felix Brannigan | Army | Private | | Battle of Chancellorsville,Virginia | May 2, 1863 | Volunteered on a dangerous service and brought in valuable information. |
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| John Brosnan | Army | Sergeant | Company E, 164th New York Infantry | Second Battle of Petersburg,Virginia | Jun 17, 1864 | Rescued a wounded comrade who lay exposed to the enemy's fire, receiving a severe wound in the effort.[9] |
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| Denis Buckley | Army | Private | | Battle of Peachtree Creek, Ga. | Jul 20, 1864 | Capture of flag of 31st Mississippi (C.S.A.).[9] |
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| John C. Buckley | Army | Sergeant | | Battle of Vicksburg, Miss. | May 22, 1863 | Gallantry in the charge of the "volunteer storming party."[9] |
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| E. Michael Burk | Army | Private | | Battle of Spotsylvania Court House, Virginia | May 12, 1864 | Capture of flag, seizing it as his regiment advanced over the enemy's works. He received a bullet wound in the chest while capturing flag.[9] |
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| Thomas Burk | Army | Sergeant | | Battle of Wilderness | May 6, 1864 | At the risk of his own life went back while the rebels were still firing and, finding Col. Wheelock unable to move, alone and unaided, carried him off the field of battle.[9] |
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| Daniel W. Burke | Army | First Sergeant | | Battle of Shepherdstown,Virginia | Sep 20, 1862 | Voluntarily attempted to spike a gun in the face of the enemy.[9] |
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| John H. Callahan | Army | Private | | Battle of Fort Blakely, Ala. | Apr 9, 1865 | Capture of flag. |
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| William Campbell | Army | Private | | Vicksburg, Mississippi | May 22, 1863 | Gallantry in the charge of the "volunteer storming party." |
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| Hugh Carey | Army | Sergeant | 82nd New York Infantry | Battle of Gettysburg, Pa. | Jul 2, 1863 | Captured the flag of the 7th Virginia Infantry (C.S.A.), being twice wounded in the effort.[11] |
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| Patrick Colbert | Navy | Coxswain | | Aboard theUSS Commodore Hull | October 31, 1864 | Served on board the U.S.S. Commodore Hull at the capture of Plymouth, 31 October 1864[9] |
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| Charles H. T. Collis | Army | Colonel | | Petersburg, Virginia | December 13, 1862 | Gallantly led his regiment in battle at a critical moment. |
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| Dennis Conlan | Navy | Seaman | | Aboard theUSS Agawam,First Battle of Fort Fisher | December 23, 1864 | Conlan served on board the U.S.S. Agawam, as one of a volunteer crew of a powder boat which was exploded near Fort Fisher, 23 December 1864.[9] |
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| Thomas Connor | Navy | Ordinary Seaman | | Fort Fisher, North Carolina | January 15, 1865 | On board the U.S.S. Minnesota, in action during the assault on Fort Fisher, 15 January 1865. |
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| James Connors | Army | Private | | Battle of Fisher's Hill, Virginia | September 22, 1864 | Capture of enemy flag. |
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| John L. M. Cooper | Navy | Coxswain | | Mobile Bay,Alabama
Mobile, Alabama | August 5, 1864
April 26, 1865 | Double MOH recipient |
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| John Corcoran | Army | Private | | Third Battle of Petersburg,Virginia | Apr 2, 1865 | Was one of a detachment of 20 picked artillerymen who voluntarily accompanied an infantry assaulting party, and who turned upon the enemy the guns captured in the assault.[12] |
| Thomas E. Corcoran | Navy | Landman | | Vicksburg, Mississippi | May 27, 1863 | Served on board the U.S.S. Cincinnati during the attack on the Vicksburg batteries and at the time of her sinking |
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| John Creed | Army | Private | | Battle of Fisher's Hill, Virginia | September 22, 1864 | Capture of the enemy flag. |
| Cornelius Cronin | Navy | Chief Quartermaster | | Aboard theUSS Richmond,Battle of Mobile Bay | August 5, 1864 | On board the U.S.S. Richmond in action at Mobile Bay on 5 August 1864[9] |
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| Richard J. Curran | Army | Assistant Surgeon | | Antietam, Maryland | September 17, 1862 | Voluntarily exposed himself to great danger by going to the fighting line there succoring the wounded and helpless and conducting them to the field hospital. |
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| Michael Dougherty | Army | Private | | Jefferson, Virginia | Oct 12, 1863 | At the head of a detachment of his company dashed across an open field, exposed to a deadly fire from the enemy, and succeeded in dislodging them from an unoccupied house, which he and his comrades defended for several hours against repeated attacks, thus preventing the enemy from flanking the position of the Union forces. |
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| Patrick Dougherty | Navy | Landsman | | Aboard theUSS Lackawanna,Battle of Mobile Bay | August 5, 1864 | As a landsman on board the U.S.S. Lackawanna, Dougherty acted gallantly without orders when the powder box at his gun was disabled under the heavy enemy fire, and maintained a supply of powder throughout the prolonged action. Dougherty also aided in the attacks on Fort Morgan and in the capture of the prize ram Tennessee. |
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| Edmund English | Army | First Sergeant | | Wilderness, Virginia | May 6, 1864 | During a rout and while under orders to retreat seized the colors, rallied the men, and drove the enemy back. |
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| Thomas T. Fallon | Army | Private | | Williamsburg,Virginia | May 1862 andJun 1864 | At Williamsburg, Virginia, assisted in driving rebel skirmishers to their main line. Participated in action, at Fair Oaks, Virginia, though excused from duty because of disability. In a charge with his company at Big Shanty, Ga., was the first man on the enemy's works.[6] |
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| Thomas Fitzpatrick | Navy | Coxswain | | Aboard theUSS Hartford,Battle of Mobile Bay | August 5, 1864 | As captain of the No. 1 gun on board the flagship U.S.S. Hartford, during action against rebel gunboats, the ram Tennessee and Fort Morgan in Mobile Bay, 5 August 1864. |
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| Augustin Flanagan | Army | Sergeant | | Battle of Chaffin's Farm, Virginia | Sep 29, 1864 | Gallantry in the charge on the enemy's works: rushing forward with the colors and calling upon the men to follow him; was severely wounded. |
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| James Flannigan | Army | Private | | Nolensville, Tenn. | Feb 15, 1863 | Was one of a detachment of 16 men who heroically defended a wagon train against the attack of 125 cavalry, repulsed the attack and saved the train. |
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| Christopher Flynn | Army | Corporal | 14th Connecticut Infantry | Battle of Gettysburg, Pa. | Jul 3, 1863 | Capture of flag of 52d North Carolina Infantry (C.S.A.).[11] |
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| James E. Flynn | Army | Sergeant | | Battle of Vicksburg, Miss. | May 22, 1863 | Gallantry in the charge of the "volunteer storming party." |
| Michael C. Horgan | Navy | Landman | | Plymouth, North Carolina | October 31, 1864 | "[D]istinguished himself by a display of coolness when he participated in landing and spiking a 9-inch gun while under a devastating fire from enemy musketry." |
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| Samuel B. Horne | Army | Captain | | Fort Harrison,Virginia | September 29, 1864 | While acting as an aide and carrying an important message, was severely wounded and his horse killed but delivered the order and rejoined his general. |
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| Michael Hudson | Marine Corps | Sergeant | | Mobile Bay,Alabama | August 5, 1864 | On board the U.S.S. Brooklyn during action against rebel forts and gunboats and with the ram Tennessee in Mobile Bay, 5 August 1864 |
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| Thomas R. Kerr | Army | Captain | | Moorefield, West Virginia | August 7, 1864 | After being most desperately wounded, he captured the colors of the 8th Virginia Cavalry (C.S.A.). |
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| Edward M. Knox | Army | Second Lieutenant | | Gettysburg,Pennsylvania | Jul 2, 1863 | Held his ground with the battery after the other batteries had fallen back until compelled to draw his piece off by hand; he was severely wounded.[13] |
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| Bartlett Laffey | Navy | Seaman | | Yazoo City, Mississippi | March 5, 1864 | Served on board the U.S.S. Marmora off Yazoo City, Miss., 5 March 1864. Landed ashore with his howitzer gun and crew in the midst of battle and contributed to the turning back of the enemy. |
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| Hugh Logan | Navy | Captain of the Forecastle | | Mobile Bay,Alabama | December 30, 1862 | On board the U.S.S. Rhode Island which was engaged in rescuing men from the stricken Monitor in Mobile Bay, on 30 December 1862. |
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| John Lonergan | Army | Captain | 13th Vermont Infantry | Gettysburg, Pennsylvania | July 2, 1863 | Gallantry in the recapture of 4 guns and the capture of 2 additional guns from the enemy; also the capture of a number of prisoners.[11] |
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| Michael Madden | Army | Private | | Mason's Island,Maryland | September 3, 1861 | Assisted a wounded comrade to the riverbank and, under heavy fire of the enemy, swam with him across a branch of the Potomac to the Union lines. |
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| Richard C. Mangam | Army | Private | | Battle of Hatcher's Run, Virginia | April 2, 1865 | Capture of flag of 8th Mississippi Infantry (C.S.A.) |
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| James Martin II | Marine Corps | Sergeant | | Mobile Bay,Alabama | August 5, 1864 | Despite damage to his ship and the loss of several men on board as enemy fire raked her decks, Sgt. Martin fought his gun with skill and courage throughout the furious 2 hour battle which resulted in the surrender of the rebel ram Tennessee and in the damaging and destruction of batteries at Fort Morgan. |
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| Peter McAdams | Army | Corporal | | Salem Heights,Virginia | May 3, 1863 | Went 250 yards in front of his regiment toward the position of the enemy and under fire brought within the lines a wounded and unconscious comrade.[14] |
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| Charles McAnally | Army | Second Lieutenant | | Spotsylvania County, Virginia | May 12, 1864 | In a hand-to-hand encounter with the enemy captured a flag, was wounded in the act, but continued on duty until he received a second wound. |
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| Patrick H. McEnroe | Army | Sergeant | | Winchester, Virginia | September 19, 1864 | Capture of colors of 36th Virginia Infantry (C.S.A.). |
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| Martin McHugh | Navy | Seaman | | Aboard theUSS Cincinnati,Operations against Vicksburg | May 27, 1863 | Serving on board the USS Cincinnati during the attack on the Vicksburg batteries and at the time of her sinking, 27 May 1863.[15] |
| Hugh Molloy | Navy | Ordinary Seaman | | Harrisonburg, Louisiana | March 2, 1864 | Served on board the USS Fort Hindman during the engagement near Harrisonburg, La., 2 March 1864. |
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| Patrick Monaghan | Army | Corporal | | Second Battle of Petersburg,Virginia | Jun 17, 1864 | Recapture of colors of 7th New York Heavy Artillery. |
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| John G. Morrison | Navy | Coxswain | | On board the USS Carondelet | July 15, 1862 | Serving as coxswain on board the USS Carondelet, Morrison was commended for meritorious conduct in general and especially for his heroic conduct and his inspiring example to the crew in the engagement with the rebel ram Arkansas, Yazoo River, 15 July 1862. |
| St. Clair A. Mulholland | Army | Major | | Chancellorsville, Virginia | May 4–5, 1863 | In command of the picket line held the enemy in check all night to cover the retreat of the Army. |
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| Dennis Murphy | Army | Sergeant | | Corinth, Mississippi | October 3, 1862 | Although wounded three times, carried the colors throughout the conflict. |
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| Michael C. Murphy | Army | Lieutenant Colonel | | Battle of North Anna, Virginia | May 24, 1864 | This officer, commanding the regiment, kept it on the field exposed to the fire of the enemy for 3 hours without being able to fire one shot in return because of the ammunition being exhausted. |
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| Christopher Nugent | Marine Corps | Sergeant | | On board the USS Fort Henry | June 15, 1863 | For his actions while serving on board the USS Fort Henry, Crystal River, Fla., 15 June 1863. |
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| James R. O'Beirne | Army | Captain | | Battle of Seven Pines, Virginia | May 31-June 1, 1862 | Gallantly maintained the line of battle until ordered to fall back. |
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| Henry D. O'Brien | Army | Corporal | | Battle of Gettysburg, Pa. | Jul 3, 1863 | Taking up the colors where they had fallen, he rushed ahead of his regiment, close to the muzzles of the enemy's guns, and engaged in the desperate struggle in which the enemy was defeated, and though severely wounded, he held the colors until wounded a second time. |
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| Oliver O'Brien | Navy | Coxswain | | Aboard theUSS John Adams | November 28, 1864 | Served as coxswain on board the U.S. Sloop John Adams, Sullvan's Island Channel, 28 November 1864. Taking part in the boarding of the blockade runner Beatrice while under heavy enemy fire from Fort Moultrie, O'Brien, who was in charge of one of the boarding launches, carried out his duties with prompt and energetic conduct. This action resulted in the firing of the Beatrice and the capture of a quantity of supplies from her. |
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| Peter O'Brien | Army | Private | | Battle of Waynesboro, Virginia | Mar 2, 1865 | Capture of flag and of a Confederate officer with his horse and equipment |
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| Thomas O'Connell | Navy | | Coal Heaver | Aboard theUSS Hartford,Battle of Mobile Bay | Aug 5, 1864 | On board the flagship USS Hartford, during successful attacks against Fort Morgan, rebel gunboats and the ram Tennessee in Mobile Bay on 5 August 1864. |
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| Timothy O'Connor | Army | Private | | Unknown | Unknown | Date and place of act not of record in War Department. |
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| John O'Dea | Army | Private | | Vicksburg, Mississippi | May 22, 1863 | Gallantry in the charge of the "volunteer storming party" |
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| Menomen O'Donnell | Army | First Lieutenant | | Battle of Vicksburg,Mississippi and Fort DeRussey, La. | May 22, 1863 andMar 14, 1864 | Voluntarily joined the color guard in the assault on the enemy's works when he saw indications of wavering and caused the colors of his regiment to be planted on the parapet. Voluntarily placed himself in the ranks of an assaulting column (being then on staff duty) and rode with it into the enemy's works, being the only mounted officer present, was twice wounded in battle. |
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| Timothy O'Donoghue | Navy | Seaman | | Aboard theUSS Signal, Red River Campaign | May 5, 1864 | Served as boatswain's mate on board the USS Signal, Red River, 5 May 1864. |
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| Stephen O'Neill | Army | Corporal | | Battle of Chancellorsville,Virginia | May 1, 1863 | Took up the colors from the hands of the color bearer who had been shot down and bore them through the remainder of the battle. |
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| George C. Platt | Army | Private | | Fairfield, Pennsylvania | July 3, 1863 | Seized the regimental flag upon the death of the standard bearer in a hand-to-hand fight and prevented it from falling into the hands of the enemy. |
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| Thomas Plunkett | Army | Sergeant | | Fredericksburg, Virginia | December 11, 1862 | Seized the colors of his regiment, the color bearer having been shot down, and bore them to the front where both his arms were carried off by a shell. |
| James Quinlan | Army | Major | | Savage's Station, Virginia | June 29, 1862 | Led his regiment on the enemy's battery, silenced the guns, held the position against overwhelming numbers, and covered the retreat of the 2d Army Corps. |
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| John Rannahan | Marine Corps | Corporal | | Fort Fisher, North Carolina | January 15, 1865 | On board the USS Minnesota in the assault on Fort Fisher, 15 January 1865. |
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| George Reynolds | Army | Private | | Winchester, Virginia | September 19, 1864 | Capture of Virginia State flag. |
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| James S. Roantree | Marine Corps | Sergeant | | Mobile Bay,Alabama | August 5, 1864 | On board the USS Oneida during action against rebel forts and gunboats and with the ram Tennessee in Mobile Bay, 5 August 1864. |
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| Peter J. Ryan | Army | Private | | Winchester, Virginia | September 19, 1864 | With one companion, captured 14 Confederates in the severest part of the battle. |
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| George Schutt | Navy | Coxswain | | St. Marks, Florida | March 5–6, 1865 | |
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| William J. Sewell | Army | Colonel | | Chancellorsville, Virginia | May 3, 1863 | For assuming command of the brigade, rallying the troops, and remaining in command though wounded.[6] |
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| William Smith | Navy | Quartermaster | | On board the USS Kearsarge | January 15, 1865 | Served as second quartermaster on board the USS Kearsarge when she destroyed the Alabama off Cherbourg, France, 19 June 1864. |
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| James Sullivan | Navy | Ordinary Seaman | | Battle of Fort Fisher, North Carolina | December 2, 1864 | On board the USS Agawam as one of a volunteer crew of a powder boat which was exploded near Fort Fisher, 2 December 1864. |
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| John Sullivan | Navy | Seaman | | USS Monticello | Jun 23, 1864 –Jun 25, 1864 | Served as seaman on board the USS Monticello during the reconnaissance of the harbor and water defenses of Wilmington, North Carolina 23 to 25 June 1864. |
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| Timothy Sullivan | Navy | Coxswain | | USS Louisville | Various | Served on board the USS Louisville during various actions of that vessel. During the engagements of the Louisville, Sullivan served as first captain of a 9 inch gun and throughout his period of service was "especially commended for his attention to duty, bravery, and coolness in action." |
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| John M. Tobin | Army | First Lieutenant | | Malvern Hill,Virginia | July 1, 1862 | Voluntarily took command of the 9th Massachusetts while adjutant, bravely fighting from 3 p.m. until dusk, rallying and re_forming the regiment under fire; twice picked up the regimental flag, the color bearer having been shot down, and placed it in worthy hands. |
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| John Walsh | Army | Corporal | | Battle of Cedar Creek, Virginia | October 19, 1864 | Recaptured the flag of the 15th New Jersey Infantry. |
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| Thomas M. Wells | Army | Chief Bugler | | Battle of Cedar Creek, Virginia | October 19, 1864 | Capture of colors of 44th Georgia Infantry (C.S.A.). |
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| Edward Welsh | Army | Private | | Vicksburg, Mississippi | May 22, 1863 | Gallantry in the charge of the "volunteer storming party." |
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| James Welsh | Army | Private | | Battle of the Crater, Petersburg,Virginia | Jul 30, 1864 | Bore off the regimental colors after the color sergeant had been wounded and the color corporal bearing the colors killed thereby saving the colors from capture.[12] |
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| Patrick H. White | Army | Captain | | Vicksburg, Mississippi | May 22, 1863 | Carried with others by hand a cannon up to and fired it through an embrasure of the enemy's works. |