[1] After the 4th Louisiana Infantry was formed, it received orders to travel to the Gulf Coast of the United States.After Ship Island was abandoned in September, the regiment moved to Brashear City and Franklin, Louisiana, in order to protect Bayou Teche and the Atchafalaya River.To counter these moves, Beauregard concentrated 5,000 men from Louisiana under Brigadier General Daniel Ruggles and other troops at Corinth, Mississippi.[3] The 4th Louisiana Infantry fought at the Battle of Shiloh on 6–7 April 1862, suffering 209 casualties out of the 575 men taken into action.[1] The regiment was assigned to Colonel Randall L. Gibson's 1st Brigade, Ruggles' 1st Division, Major General Braxton Bragg's Second Corps.[6] At one point, a Confederate officer with a captured U.S. flag rode past the regiment and soldiers from the 4th Louisiana fired on him, inadvertently hitting other nearby friendly units.[7] Later in the battle, Gibson's brigade made three or four unsuccessful assaults on a Union position called the Hornet's Nest.In late July, the unit moved to Camp Moore to join the forces of Major General John C. Breckinridge.[10][Note 1] The regiment occupied Port Hudson, Louisiana, and began building fortifications there in fall and winter 1862.[20] Lee ordered his corps to attack well-intrenched Federals and after a short bombardment, the troops went forward.In the one-sided debacle, Lee's attack was immediately stopped with 1,400 casualties, whereas Union losses numbered only 172.Because it was almost dark, Confederate General John Bell Hood was able to rally his army on a new defensive line.[24] On the morning of 17 December, the 500 survivors of Gibson's brigade defended a pontoon bridge across the Harpeth River at Franklin, Tennessee.Of that total, 155 were killed in action, 60 died of disease, 2 suffered accidental deaths, 2 were murdered, and 1 drowned.