The regiment served with the XIX Corps, Army of the Gulf during the Red River Campaign in 1864.

They were sent north on July 15 with other units of the XIX Corps to become part of the Army of the Shenandoah and served as infantry in several large battles during the Valley Campaigns of 1864.

In February 1865, the unit was remounted again as cavalry and served in the Shenandoah Valley until the end of the war.

What remained of the regiment took part in the Grand Review of the Armies in Washington, D.C. and then were deployed to Fort Leavenworth, Kansas.

After serving in Kansas and Nebraska, they were mustered out on September 28 and returned to Boston.

The regiment was formed from troops already serving in the field in Louisiana on June 17, 1863 by Special Order No.

The 41st Massachusetts retained their original company letter designations during the consolidation.

The regiment was attached to 2nd Brigade, 4th Division, XIX Corps, Army of the Gulf.

[1] Cavalry units so named were known for their marksmanship and expected to act as sharpshooters when dismounted.

[2] They left Boston together by steamship on January 13, 1862 and arrived at Ship Island in the Gulf of Mexico on February 12, 1862.

Here they were officially organized into a battalion by order of Brigadier General John W. Phelps under the command of Capt.

[3] Soon after, the battalion was shipped to New Orleans, Louisiana and became part of the Department of the Gulf.

For roughly a year, the three companies were stationed at New Orleans, Baton Rouge, and Plaquemines Parish, Louisiana, mostly performing outpost duty.

They participated in the Siege of Port Hudson and other operations in Louisiana, suffering some loss.

The regiment remained there for three months on routine duty until March 28, 1863 when it joined the expedition in the Bayou Teche region.

[6] The regiment served with the Cavalry Brigade, Department of the Gulf, to July 1863.

Cavalry Brigade, District of Port Hudson, Louisiana, Department of the Gulf, to October 1863.

Moved to Stephenson's Landing, then to Remount Camp, Pleasant Valley, Md., December 25–28, and duty there until February 24, 1865.