 In 1864, many Texas forces, including a division under Camille de Polignac, a French prince and Confederate general, moved into Northwestern Louisiana to stall Union Maj. Gen. Nathaniel Banks' Red River Campaign, which was intended to advance into Texas from its eastern border.Confederate forces halted the expedition at the Battle of Mansfield, just east of the Texas border.Union forces from Brazos Island launched the Brazos Santiago Expedition, leading to the last battle of the Civil War, the Battle of Palmito Ranch, fought in Texas on May 12, 1865, well after Robert E. Lee's surrender on April 9, 1865, at Old Appomattox Court House, Virginia.