The Second Battle of Sabine Pass (September 8, 1863) was a failed Union Army attempt to invade the Confederate state of Texas during the American Civil War. The Union Navy supported the effort and lost three gunboats during the battle, two captured and one destroyed. It has often been credited as the war's most one-sided Confederate victory. Confederate President Jefferson Davis wrote in 1876 that he "considered the [second] battle of Sabine pass the most remarkable in military history." Background France was openly sympathetic to the Confederate States of America early in the Civil War, but never matched its sympathy with diplomatic or military action. After Mexican forces were defeated by French forces in summer 1863, Mexican president Benito Juárez escaped the capital, and the French installed Austrian Maximilian as "Emperor". With a de facto French government bordering Texas on the south across the Rio Grande, the Confederates hoped to establish a formal route between Texas and Mexico by way of which the Confederacy could obtain much-needed supplies. United States President Abraham Lincoln was well aware of Confederate intentions and sent an expedition to establish a military presence in Texas and to discourage Maximilian from opening trade with the Confederacy. The military Federal force was commanded by Major General Nathaniel P. Banks, a political general with little discernible command ability. Banks's original intent was to launch a combined Army-Navy campaign in northwest Louisiana. The Union plan was to send Union Navy warships from the Mississippi up the tributary Red River, which was navigable upstream as far as where the boundaries of the Confederate states of Louisiana, Arkansas, and Texas came together. The Union had effected its Capture of New Orleans on May 1, 1862, and after the July 3, 1863 surrender of Confederate Vicksburg, the Union military had better control of both the east and west banks and of the mouth of the Mississippi. Unusually low water in the Red River at this time, however, prevented even relatively low-draft Union gunboats from operating effectively, and the anticipated overland Union invasion of Texas was further delayed. Consequently, General Banks ordered his subordinate, Major General William B. Franklin, who would coordinate with the U.S. Navy, to enter the Sabine River from the Gulf of Mexico and defeat the small Confederate detachment at "Fort Sabine" on the river's west bank (Texas side) at Sabine Pass. about 2 miles (3.2 km) upstream of the