The 4th New York Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War. It is also known as the 1st Scott's Life Guard.
 The 4th New York organized in the city of New York, under the auspices of the "Veteran Scott Life Guard," an association incorporated by the Legislature, Friday, March 26, 1861, and composed of persons who had served in the Mexican–American War. Eight companies were mustered into the State service by Maj. Robert Taylor, Monday, April 22, 1861, on which day Edward McK. Hudson was elected Colonel; John D. MacGregor, Lieut. Colonel, and Alfred W. Taylor, Major, whose election was confirmed by the State Board on April 25. On Thursday, May 9, the companies recruited for it were formed by the State Board into a regiment, and numbered. Six companies (C, D, E, F, H and K), were mustered into the United States service for a two years' term on May 2, two companies (A and G), on May 7, and two companies (B and I), on May 9th. 
 On the 13th of May, Col. Hudson having declined command of the regiment, Alfred W. Taylor was elected Colonel, and William Jameson, Major, in place of Taylor promoted to Lieut. Colonel. On Wednesday, May 8, 742 United States percussion muskets, pattern 1848, calibre 69, were issued to the regiment by Commissary General Welch.
 To assist in the organization of the Regiment the Union Defense Committee of New York city expended $3,987.16. The total expenditure by the State, on, behalf of the regiment, exclusive of subsistence and quarters, up to August 15,1861, was $43,897,81. At the end of their term of service, the regiment returned to New York city, where they were honorably discharged May 25, 1863.
 The original companies were recruited principally:
 On Monday, June 3, 1861, it left New York and on Friday, June 3, arrived at Newport News. It was quartered there until July 26, when it was sent to Baltimore, MD. The 4th remained there until Saturday, August 31. On that day, it was sent to Havre de Grace, MD, at the mouth of the Susquehanna River and the head of Chesapeake Bay. It remained there until March 26, 1862 serving as security between there and Baltimore for the vital Philadelphia and Baltimore section of the Pennsylvania Railroad supply line. It was next sent to garrison Fort McHenry, Baltimore, where it remained until Friday, June 6.
 Leaving Fort McHenry, the 4th went to Suffolk where it was attached to VII Corps. It spent the summer in garrison at Suffolk where it had a change of command with Col. McGregor relieving Col. Taylor. On September 6, it was sent to Washington. DC. Leaving there on September 11, it moved up the Potomac and joined the Army of the Potomac's 3rd Brigade, 3rd Division of II Corps. The 4th fought in its first battle at Antietam on September 17. It suffered heavy losses of 2 officers and 42 enlisted men killed, 12 enlisted men mortally wounded, 6 officers and 124 wounded, and 1 missing for an aggregate of 187.
 After Antietam, the 4th was part of the force sent to reoccupy Harper's Ferry on Monday, September 22 as the Rebels had withdrawn to the Rappahannock. It remained in the garrison there for five and a half weeks until October 30, when it marched down to Falmouth with the army arriving opposite Fredericksburg on November 17.
 From December 12-15, 1862, it was heavily engaged at the Battle of Fredericksburg. In that battle on December 13, it suffered 6 enlisted men killed, 7 enlisted men mortally wounded, 6 officers (including the Colonel) and 49 enlisted men wounded, and 6 missing for an aggregate of 74. After the battle, the regiment recrossed the Rappahannock and went into winter quarters at Falmouth, VA.
 In January 1863, the 4th took part in the ineffective "Mud March" and returned to its winter quarters. It remained there until the army began manouvering in April in the Chancellorsville Campaign.
 In the campaign, Col. McGregor, as the senior regimental commander, assumed command of the brigade delegating the regiment to Lieut. Col. William Jameson. The 4th and its brigade narrowly escaped capture on May 1, on the Plank Road leading to Fredericksburg. Unknowingly moving toward an overwhelming Rebel force, Gen. Hooker recalled it back to Federal lines before contact. Upon return to the main body of the army, the 4th was detailed to special duty guarding the II Corps hospital. As a result, it suffered no losses in the defeat.
 By mid-May, the 4th detached from the 3rd brigade and returned to New York city where it mustered out in City Hall Park on May 25, 1863.
 Attached to:
 The official list of battles in which the regiment bore a part:
 During its service it lost by death, killed in action, 2 officers, 48 enlisted men; of wounds received in action, 19 enlisted men; of disease and other causes, 1 officer, 23 enlisted men; total, 3 officers, 90 enlisted men; aggregate, 93
 The 4th New York were issued the Model 1842 Springfield Muskets .69 caliber, smoothbore when accepted by the state on Wednesday, April 25, 1861. At some time prior to the Fredericksburg campaign, the regiment exchanged their 1842 Springfield smoothbores for
a mix of Springfield Model 1855/1861 National Armory (NA) and contract rifle-muskets.The regiment reported the following surveys:
 Fredericksburg
 Chancellorsville
 The men of the regiment were issued the dark blue New York state eight button jackets with shoulder straps trimmed in light blue. They also were issued the state dark blue trousers. As their service continued, the standard sky blue trousers were worn when the original trousers wore out.
 Footnotes
 Citations
 References