Assigned to defend Mobile, Alabama, the battalion fought at Spanish Fort in April 1865.

At first, the battalion was detailed to act as President Jefferson Davis' bodyguard and also as prison guards.

On 21 April, it moved to Camp Mercer near Savannah where it was joined by Company F. On 4 June, the battalion transferred to James Island near Charleston.

[1] On 16 June, the battalion fought in the Battle of Secessionville and helped repulse the second Federal attack.

[4][5] The battalion became part of General Joseph E. Johnston's army and served in the Siege of Jackson from 9–16 July.

[6] At 8:00 am on 19 September, Major General Nathan B. Forrest asked for help but Wilson declined until he could get authorization from Walker.

Hearing the sound of gunfire approaching, Major General George Henry Thomas sent a Union division to assist Croxton.

It only escaped annihilation because the Federals became confused in the deep forest, but Wilson's brigade was reduced to less than 450 men.

[10] Every officer present in the 4th Battalion was killed or wounded except one lieutenant, and more than half the men were casualties.

Missionary Ridge is an imposing natural feature, but overconfident Breckinridge and army commander General Braxton Bragg completely mismanaged the Confederate defenses.

Attacked in front and flank, the soldiers of Gibson's brigade put up a futile resistance, but then had to run for it.

[3] In the Atlanta campaign, the 4th Louisiana Battalion remained in Gibson's brigade, which formed part of Stewart's division in Lieutenant General John Bell Hood's corps.

[18] At New Hope Church on 25 May, Major General Joseph Hooker's corps attacked Stewart's division.

[18] During the Battle of Atlanta on 22 July, Stewart's division, now commanded by Major General Henry DeLamar Clayton was ordered to attack.

[23] During the Nashville campaign in late 1864, the 4th Battalion guarded a pontoon bridge over the Duck River and never came into action.