3rd Infantry Regiment was formed near Pensacola, Florida, in July, 1861. Its companies were recruited in the counties of St. Johns, Hernando, Jefferson, Duval, Wakulla, Madison, Columbia, and Suwannee. The unit served along the coast at Talbot Island and Cedar Keys, then moved to Mobile. After fighting at Perryville it was assigned to Preston's, Stovall's, Finley's, J.A. Smith's Brigade, and during December, 1862, consolidated with the 1st Florida Infantry Regiment. The 3rd was engaged at Murfreesboro and Jackson, then participated in the campaigns of the Army of Tennessee from Chickamauga to Bentonville. It was organized with 950 officers and men, and the 1st/3rd lost twenty-six percent of the 23 in action at Chickamauga. In December, 1863, this command totalled 240 men and 119 arms, but only a remnant surrendered in April, 1865. The field officers were Colonel William S. Dilworth; Lieutenant Colonels Lucius A. Church, Elisha Mashburn, and Arthur J.T. Wright; and Major John L. Phillips.

Companies

Company	County	Nickname	Commander	Number of Soldiers
F&S			Col. William S. Dilworth	20
A	Duval	Jacksonville Light Infantry	Capt. Holmes Steele	118
B	Saint Johns	Saint Augustine Blues	Capt. John Lott Philips	124
C	Hernando	Hernando Guards (Wildcats)	Capt. Walter Terry Saxon	112
D	Wakulla	Wakulla Guards	Capt. Daniel L. Frierson	103
E	Jefferson	Jefferson Beauragards	Capt. Daniel E. Bird	123
F	Duval	Cow Boys	Capt. Lucius A. Hardee	111
G	Madison	Madison Grey Eagles	Capt. Thomas Langford	165
H	Jefferson	Jefferson Rifles	Capt. William Girardeau	132
I	Columbia	Dixie Stars	Capt. Jesse B. Wood	91
K	Columbia & Suwanee	Columbia & Suwanee Guards	Capt. William Parker	107

Engagements and Battles

1862

• New Smyrna (Companies E & H were involved)
• Brick Church
• Kentucky Campaign
• Battle of Perryville
  Battle of Perryville
  The Battle of Perryville, also known as the Battle of Chaplin Hills, was fought on October 8, 1862, in the Chaplin Hills west of Perryville, Kentucky, as the culmination of the Confederate Heartland Offensive during the American Civil War. Confederate Gen. Braxton Bragg's Army of Mississippi won a...
  
  

1863

• Battle of Murfreesboro
• Jackson Siege
• Vicksburg Campaign
• Battle of Chickamauga
  Battle of Chickamauga
  The Battle of Chickamauga, fought September 19–20, 1863, marked the end of a Union offensive in southeastern Tennessee and northwestern Georgia called the Chickamauga Campaign...
  
  
• Battle of Chattanooga
  Battle of Chattanooga
  There were three Battles of Chattanooga fought in or near Chattanooga, Tennessee, during the American Civil War:* First Battle of Chattanooga, minor artillery bombardment by Union Brigadier General James S. Negley against Confederate Maj. Gen...
  
  

1864

• Atlanta Campaign
• New Hope Church
• Battle of Atlanta
  Battle of Atlanta
  The Battle of Atlanta was a battle of the Atlanta Campaign fought during the American Civil War on July 22, 1864, just southeast of Atlanta, Georgia. Continuing their summer campaign to seize the important rail and supply center of Atlanta, Union forces commanded by William T. Sherman overwhelmed...
  
  
• Ezra Church
• Atlanta Siege
• Battle of Spring Hill
  Battle of Spring Hill
  The Battle of Spring Hill was fought November 29, 1864, at Spring Hill, Tennessee, as part of the Franklin-Nashville Campaign of the American Civil War. The Confederate Army of Tennessee, commanded by Lt. Gen. John Bell Hood, attacked a Union force under Maj. Gen. John M. Schofield as it...
  
  
• Battle of Franklin
  Battle of Franklin
  Battle of Franklin may refer to three battles of the American Civil War:* Battle of Franklin , a major battle fought November 30, 1864, at Franklin, Tennessee as part of the Franklin-Nashville Campaign...
  
  
• Battle of Nashville
  Battle of Nashville
  The Battle of Nashville was a two-day battle in the Franklin-Nashville Campaign that represented the end of large-scale fighting in the Western Theater of the American Civil War. It was fought at Nashville, Tennessee, on December 15–16, 1864, between the Confederate Army of Tennessee under...
  
  

1865

• Carolinas Campaign
• Battle of Bentonville
  Battle of Bentonville
  At 3 p.m., Confederate infantry from the Army of Tennessee launched an attack and drove the Union left flank back in confusion, nearly capturing Carlin in the process and overrunning the XIV Corps field hospital. Confederates under Maj. Gen. D.H. Hill filled the vacuum left by the retreating...