173rd New York Infantry

== Regimental History and Service Record ==
"4th National Guard"
Organized at Brooklyn, N.Y., October and November, 1862. Left State for New Orleans, La., December 9, 1862. Attached to Grover's Division, Dept. of the Gulf, to January, 1863. 2nd Brigade, 3rd Division, 19th Army Corps, Dept. of the Gulf, to September, 1863. 1st Brigade, 3rd Division, 19th Army Corps, to February, 1864. 3rd Brigade, 1st Division, 19th Army Corps, Dept. of the Gulf, to July, 1864, and Army of the Shenandoah, Middle Military Division, to February, 1865. 3rd Brigade, 1st Provisional Division, Army of the Shenandoah, to April, 1865. 3rd Brigade, Dwight's Division, Dept. of Washington, to June, 1865. District of Savannah, Ga., Dept. of the South, to October, 1865.
SERVICE.--Occupation of Baton Rouge, La., December 17, 1862, and duty there until March, 1863. Operations on Bayou Plaquemine and the Black and Atchafalaya Rivers February 18-28. Operations against Port Hudson, La., March 7-27. Moved to Algiers April 3, thence to Brashear April 8. Operations in Western Louisiana April 9-May 14. 
* April 11-20, 1863 - The (I) Bayou Teche Campaign
Fort Bisland, near Centreville, April 12-13. Expedition from St. Martinsville to Breaux Bridge April 17-21. Expedition from Opelousas to Chicotsville and Bayou Boeuf April 26-29. Expedition to Alexandria, on Red River, May 4-12. March to Port Hudson May 19-26. Siege of Port Hudson May 26-July 9. Assaults on Port Hudson May 27 and June 14. Surrender of Port Hudson July 9. Moved to New Orleans July 15, and duty there until August 28. Sabine Pass (Texas) Expedition September 4-11. Moved to Brashear City September 16, thence to Berwick. 
* October 3-November 30, 1863 - The (II) Bayou Teche Campaign 
Vermillionville November 11. At New Iberia until January 7, 1864. Moved to Franklin January 7, and duty there until March. 
* March 10-May 22, 1864 - The Red River Campaign
** Advance from Franklin to Alexandria March 14-26. 
** Battle of Sabine Cross Roads April 8. 
** Pleasant Hill April 9. 
** Monett's Bluff, Cane River Crossing, April 23. 
** At Alexandria April 26-May 13. 
** Construction of dam at Alexandria April 30-May 10. 
** May 13-20, 1864 - Retreat from Alexandria, Louisiana to Morganza, Louisiana
Mansura May 16. Duty at Morganza until July. Moved to Fortress Monroe, Va., thence to Washington, D.C., July 2-31. Sheridan's Shenandoah Valley Campaign August 7-November 28. Served with Brigade, detached as train guard for the army, from August 14 to October 27. Duty near Middletown and Newtown until December, and at Stevenson's Depot and Winchester until April, 1865. Moved to Washington, D.C., and duty there until June. Grand Review May 23-24. Moved to Savannah, Ga., June 30-July 7. Duty there and in the Sub-District of Ogeechee, District of Savannah, until October. Mustered out October 18, 1865.
== Regimental Roster ==
== Regiment Statistical Information ==
* Regiment lost during service 6 Officers and 38 Enlisted men killed and mortally wounded and 2 Officers and 129 Enlisted men by disease. Total 175.
== Legacy ==
== Notes ==
== Sources == 
* (Pages 745, 749, 750, 753, 1468)
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