In March 1863, Union commander Nathaniel P. Banks, headquartered near New Orleans, wanted to drive back the Confederate forces in western Louisiana and secure a route to connect with the Mississippi River north of Confederate-held Port Hudson.
Using a combined force of infantry and Union Navy vessels, Banks advanced up the Teche against Confederate units under the overall command of Richard Taylor, son of former U.S. President Zachary Taylor.
Taylor retreated from the Teche region, and Banks was able to capture the Confederate fort at Butte a la Rose and Alexandria.
In October, he ordered troops under Maj. Gen. William B. Franklin to move north-west from New Iberia and the Berwick Bay area to probe the land route toward Texas.
The difficulty of the route, the resistance from Confederates, and the success of a coastal operation in Texas led to the termination of Franklin's advance.