The Battle of Palmito Ranch, also known as the Battle of Palmito Hill, is considered by some criteria the final battle of the American Civil War. It was fought May 12 and 13, 1865, on the banks of the Rio Grande east of Brownsville, Texas, and a few miles from the seaport of Los Brazos de Santiago, at the southern tip of Texas. The battle took place more than a month after the surrender of the Army of Northern Virginia under Robert E. Lee to Union forces at Appomattox Court House, which had since been communicated to both commanders at Palmito. However, in early May Confederate General Edmund Kirby Smith had rejected a proposal from Union Major-General John Pope to surrender Confederate forces in the Trans-Mississippi Department on the same terms that General Ulysses S. Grant had given to Robert E. Lee. As such Kirby Smith only officially surrendered all Confederate forces in the Trans-Mississippi Department on June 2, 1865.
Union and Confederate forces in southern Texas had been observing an unofficial truce since the beginning of 1865, but Union Colonel Theodore H. Barrett, newly assigned to command an all-black unit and never having been involved in combat, ordered an attack on a Confederate camp near Fort Brown for unknown reasons. The Union attackers captured a few prisoners, but the following day the attack was repulsed near Palmito Ranch by Colonel John Salmon Ford, and the battle resulted in a Confederate victory. Union forces were surprised by artillery said to have been supplied by the French Army garrison occupying the up-river Mexican town of Matamoros.
Casualty estimates are not dependable, but Union Private John J. Williams of the 34th Indiana Infantry Regiment is believed to have been the last man killed during the engagement. He could then arguably be considered the last man killed in the American Civil War.
After July 27, 1864, the Union Army withdrew most of the 6,500 troops deployed to the lower Rio Grande Valley, including Brownsville, which they had occupied since November 2, 1863. The Confederates were determined to protect their remaining ports, which were essential for cotton sales to Europe and the importation of supplies. The Mexicans across the border tended to side with the Confederates because of the lucrative cotton export trade. Beginning in early 1865, the rival armies in south Texas honored a gentlemen's agreement, as they saw no point in further hostilities between them.
Union Major General Lew Wallace proposed a negotiated end of hostilities in Texas to Confederate Brigadier General James E. Slaughter, and met with Slaughter and his subordinate Colonel Ford at Port Isabel on March 11–12, 1865. Despite Slaughter's and Ford's agreement that combat would prove tragic, Slaughter's superior, Confederate Maj. Gen. John G. Walker, rejected the ceasefire in a scathing exchange of letters with Wallace. Despite this, both sides honored a tacit agreement not to advance on the other without prior written notice.
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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