Texas and Louisiana
Operations to Blockade the Texas Coast
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- First Battle of Sabine Pass
- Battle of Corpus Christi
- Battle of Galveston Harbor
- Battle of Galveston
- Action off Galveston Light
- Second Battle of Sabine Pass
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Operations Against Galveston
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- Battle of Galveston Harbor
- Battle of Galveston
- Action off Galveston Light
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Taylor's Operations in West Louisiana
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- LaFourche Crossing
- Capture of Brashear City
- Donaldsonville II
- Kock's Plantation
- Stirling's Plantation
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Red River Campaign
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- Fort De Russy
- Mansfield
- Pleasant Hill
- Blair's Landing
- Monett's Ferry
- Mansura
- Yellow Bayou
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Expedition from Brazos Santiago
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The Union mounted several attempts to capture the trans-Mississippi regions of Texas and Louisiana from 1862 until the war's end. With ports to the east under blockade or captured, Texas in particular became a blockade-running haven. Referred to as the "back door" of the Confederacy, Texas and western Louisiana continued to provide cotton crops that were transferred overland to the Mexican border towns of Matamoros and the port of Bagdad, and shipped to Europe by means of blockade runners in exchange for supplies.
Determined to close this trade, the Union mounted several invasion attempts of Texas, each of them unsuccessful. Confederate victories at Galveston, Texas, the Battle of Sabine Pass and the Second Bayou Teche Campaign repulsed invasion forces. The Union's disastrous Red River Campaign in western Louisiana, including a defeat at the Battle of Mansfield, effectively ended the Union's final invasion attempt of the region until the fall of the Confederacy. Jeffery Prushankin argues that Kirby Smith's "pride, poor judgment, and lack of military skill" prevented General Richard Taylor from potentially winning a victory that could have greatly affected the military and political situation east of the Mississippi River.
Isolated from events in the east, the Civil War continued at a low level in the Trans-Mississippi theater for several months after Lee's surrender in April 1865. The last battle of the war occurred at Palmito Ranch in southern Texas – a Confederate victory.