Army of the Potomac against Richmond and Petersbury they found themselves engaged in the siege of the latter place from June 16, 1864, until April 2, 1865. During the Siege they took part in the operations against Weldon Railroad in June and August 1864, the engaged at Poplar Springs Church from September 29 to October 2, and in the actions near Hatchers Run in late October 1864. From February 5 to 7, 1865, they were engaged again in the Hatcher's Run area. It was during this time that on June 2, 1864, the members of the 12th New York and 14th Brooklyn Regiments were merged into the regiment, the 12th becoming Companies F and E, and the 14th Companies G, H, I, & K. From March 28 until April 9, 1865, the regiment was actively engaged in the closing operations between the Army of the Potomac and the Army of Northern Virginia. On March 29, 30, and 31st, they were engaged along the White Oak Road, before taking part in the assault upon the Confederate forces at Five Forks on April 1. This assault forced the fall of Petersburg, and the ensuing pursuit of the Confederate Army to Appomattox Courthouse, Virginia. On April 9, 1865, the Confederate Army of Northern Virginia surrendered to the Army of the Potomac. With the surrender of the Confederate forces the regiment marched back to Washington, D.C., in May 1865, and on May 23, 1865, they took part in the Grand Review of the Armies of the United States in Washington. In May 1865 the regiment moved to Hart's Island, New York, where they finished out the remainder of their service. It was during this time that several men from the 140th, 185th, and 189th Infantry Regiments whose terms had not expired were transferred to the regiment to finish out their terms of service. On August 21, 1865, the regiment was mustered out of United States service at Hart's Island, New York. Casualties The regiment suffered the following casualties during its service: Killed In Action: 7 Officers, 49 Enlisted Died of Wounds: 4 Officers, 24 Enlisted Died of Disease and other causes: 86 Enlisted (57 Died as POW's) Total: 11 Officers and 159 Enlisted Men. Regimental Officers Colonel Cleveland Winslow Colonel Frederick Winthrop See also List of New York Civil War regiments References Further reading Annual Report of the Adjutant General of the State of