The Battle of St. John's Bluff was fought from October 1–3, 1862, between Union and Confederate forces in Duval County, Florida, during the American Civil War. The battle resulted in a significant Union victory, helping secure their control of the Jacksonville area.
The St. Johns River was important in the Union effort of taking Florida. If Federals controlled the St. Johns River then they could raid Confederate positions in the interior of Florida and also use the river as a barrier for control of the east. The Union wanted to control North Florida and use it as a haven for escaped slaves and use its position to initiate Reconstruction for Florida. Federals first occupied Jacksonville, Florida in March 1862. Federal gunboats stationed at Mayport Mills operated up and down the river.
Early in the war, in order to stop the movement of Union Navy ships up the St. Johns River, Confederate Brigadier General Joseph Finnegan established an artillery battery on St. Johns Bluff, on the south side of the river 18 miles downstream from Jacksonville, Florida. The Union victories at Fort Donelson and Fort Henry forced Florida Confederates to go to Tennessee to reinforce the Confederate Army. With few resources Finnegan managed to fortify St. Johns Bluff where Confederate troops used slave labor to construct defenses. This was part of a series of Confederate defensive works that had been constructed near Fort Caroline and Yellow Bluff Fort.
On September 11 Confederates opened fire on Union gunboat USS Uncas approaching the bluff. The USS Patroon joined the USS Uncas and opened fire on the bluff but failed to destroy the Confederate position. The Union dispatched over 800 soldiers to Florida from South Carolina to take the bluff expecting it to be a challenging obstacle. Union reinforcements arrived on October 1 at Mayport Mills. According to Brigadier General John Milton Brannan, the leader of the Union's expeditionary force, "On the 1st instant the gunboats made a reconnaissance on the river, and were immediately and warmly engaged by the batteries on Saint John’s Bluff, on which they withdrew." Among the Union Army regiments participating in this engagement was the 47th Pennsylvania Infantry Regiment, which landed on the bank of Buckhorn Creek at 7 a.m. on October 1 and marched toward "Parker's plantation," according to Colonel Tilghman H. Good, the regiment's commanding officer.
The next day, Union soldiers under Brannan approached the bluff from the rear. Brannan later reported that, on October 2, "a scouting party of the Forty-seventh Regiment Pennsylvania Volunteers, under Captain Keck, of that regiment, surprised a camp of the rebels, taking some camp equipage and about sixty stand of arms of all descriptions, but chiefly rifles. The men effected their escape, having horses and being much favored by the intricate nature of the ground."
The American Civil War (1861–1865) was the deadliest conflict in American history, killing an estimated 620,000 to 750,000 soldiers and an unknown number of civilians. The Confederate States of America, formed by eleven seceding Southern states, faced the Union in four years of warfare across 23 states and territories. Major engagements included First and Second Bull Run, Antietam (the bloodiest single day in American history, September 17, 1862), Chancellorsville, Gettysburg (July 1–3, 1863), Vicksburg (surrendered July 4, 1863), and Sherman's March through Georgia and the Carolinas (1864–1865). President Lincoln issued the Emancipation Proclamation on January 1, 1863, transforming the war's stated purpose to include the abolition of slavery and enabling the enlistment of approximately 180,000 Black men in the United States Colored Troops. Confederate General Robert E. Lee surrendered to Ulysses S. Grant at Appomattox Court House on April 9, 1865. The war resolved the question of secession and ended American slavery, though Reconstruction would face sustained resistance in its attempt to secure civil rights for formerly enslaved people.
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