The Blues joined eight other companies of Savannah militias to form the First Volunteer Regiment of Georgia.

At the order of Governor Joseph E. Brown to occupy strategic Fort Pulaski, Commander of the Regiment, Colonel Alexander Lawton, and his adjutant Charles H. Olmstead would plan and execute the first act of rebellion in the state of Georgia, On January 3, 1861, a force of 134 men and 6 artillery pieces landed at the deserted fort, and raised the red star of Georgia for the first time.

Most of the force was made up of men from the Savannah Volunteer Guards, the Chatham Artillery, Georgia Hussars, and the Oglethorpe Light Infantry.

In May 1864, the Blues left Fort McAllister to reinforce Confederate Gen. Joseph E. Johnston's army in northern Georgia.

After Union Maj. Gen. William T. Sherman's forces captured Atlanta, the Blues went into Tennessee and fought in the Battle of Nashville.

Arriving in Savannah in March, they were informed that due to the growing war in Europe, they would not muster out.

The unit was reorganized and designated Headquarters Battery, 118th Field Artillery, assigned to the 30th Infantry Division.

From 1945 to 1973, the unit underwent a series of redesignations culminating in its current form, as part of the 48th Infantry Brigade.