The 4th New Jersey Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. Overall, the regiment lost 5 officers and 156 enlisted men killed or mortally wounded and 2 officers and 103 enlisted men to disease during the Civil War. The regiment's first commander, Colonel James H. Simpson, helped lead the 4th N.J through the hardships of the first year of campaigning.
The 4th New Jersey Infantry Regiment was first organized at Trenton, New Jersey for three months service on April 27, 1861. It was attached to Runyon's New Jersey Brigade, Defenses of Washington, to June 1861. It was then attached to 1st Brigade, Runyon's Reserve Division, McDowell's Army of Northeast Virginia.
The 4th New Jersey Infantry was reorganized at Camp Olden in Trenton for three years service on August 19, 1861, under the command of Colonel James H. Simpson.
The regiment was attached to Kearney's Brigade, Division of the Potomac, to October 1861. Kearney's Brigade, Franklin's Division, Army of the Potomac, to March 1862. 1st Brigade, 1st Division, I Corps, Army of the Potomac, to April 1862. 1st Brigade, 1st Division, Department of the Rappahannock, to May 1862. 1st Brigade, 1st Division, VI Corps, Army of the Potomac and Army of the Shenandoah, to July 1865.
The regiment was surrounded at Gaines Mill and most of its men taken prisoner. After the Seven Days Battles, they were freed by the Confederate authorities in a prisoner exchange. The 4th New Jersey had been armed with M1861 Springfield rifles, however upon returning from captivity, the authorities in Washington had no rifled muskets to rearm the regiment with, thus they were given outdated .69 smoothbore muskets. The regiment was forced to use them until the Battle of South Mountain in September, when they rearmed themselves with Enfield rifles dropped by retreating Confederates.
Left New Jersey for Washington, D.C., August 20, 1861. Duty in the defenses of Washington, D. C., until March 1862. Advance on Manassas, Va., March 8–15, 1862. Advance from Alexandria to Bristoe Station April 7–11. Embarked for the Virginia Peninsula April 17. Siege of Yorktown April 19-May 5 (on transports). West Point May 7–8. Reconnaissance to East Branch Chickahominy June 7 (Companies D, F, and I). Seven Days Battles before Richmond June 25-July 1: Battles of Gaines's Mill June 27, Charles City Cross Roads and Glendale June 30, Malvern Hill July 1. At Harrison's Landing until August 16. Movement to Fort Monroe, then to Manassas, Va., August 16–26. Pope's Campaign in northern Virginia August 26-September 2. Bull Run Bridge, Manassas, August 27. Second Battle of Bull Run August 30. Cover Pope's retreat to Centreville August 30–31. Maryland Campaign September 6–22. Battles of Crampton's Pass, South Mountain, September 14. Battle of Antietam September 16–17. At Sharpsburg, Md., until October 29. Movement to Falmouth, Va., October 29-November 19. Battle of Fredericksburg December 12–15. At Falmouth until April 27, 1863. "Mud March" January 20–24. Chancellorsville Campaign April 27-May 6. Operations at Franklin's Crossing April 29-May 2. Battle of Maryes Heights, Fredericksburg, May 3. Salem Heights May 3–4. Banks's Ford May 4. Gettysburg Campaign June 11-July 24. Battle of Gettysburg July 2–4. Guarding ammunition train July. In camp near Warrenton, Va., until September 15, and at Culpeper Court House until October. Bristoe Campaign October 9–22. Advance to line of the Rappahannock November 7–8. Rappahannock Station November 7. Mine Run Campaign November 26-December 2. At Brandy Station to May 1864. Campaign from the Rapidan to the James May 3-June 15. Battle of the Wilderness May 5–
The 4th New Jersey Infantry mustered out of service July 9, 1865 at Hall's Hill, Virginia.
The regiment lost a total of 266 men during service; 5 officers and 156 enlisted men killed or mortally wounded, 2 officers and 103 enlisted men died of disease.
The 4th New Jersey Volunteer Infantry portrays the group at many reenactments. They also do fundraiser events and living histories in various parks and battlefields. [1]
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This article contains text from a text now in the public domain : Dyer, Frederick H. (1908). A Compendium of the War of the Rebellion. Des Moines, IA: Dyer Publishing Co. 
