1st Infantry Regiment, formerly the 1st Florida Infantry Battalion, was assembled in March, 1861, at Chattahoochee Arsenal. Its members were from the counties of Leon, Alachua, Madison, Jefferson, Jackson, Franklin, Gadsden, and Escambia. The unit was involved in the conflict on Santa Rosa Island, then fought at Shiloh, Farmington, and Perryville. Later it was placed in General Preston's, Stovall's, Finley's, and J.A. Smith's Brigade, and in December, 1862, it was united with the 3rd Florida Infantry Regiment. This command fought at Murfreesboro and Jackson, participated in the campaigns of the Army of Tennessee from Chickamauga to Nashville, and was active in North Carolina. The 1st/3rd lost twenty-six percent of the 531 engaged at Murfreesboro, had thirty-four percent disabled out of the 273 at Chickamauga, and totalled 240 men and 119 arms in December, 1863. Few surrendered on April 26, 1865. The field officers were Colonels J. Patton Anderson and William Miller, Lieutenant Colonels William K. Beard and Thaddeus A. McDonell, and Major Clover A. Ball.