The Texas Marine Department (1861–1865) was formed by the State of Texas shortly after Texas came under blockade from the Union Navy in 1861. It operated under the control of the Confederate Army during the Civil War.
"The Texas Marine Department, an organization unique in the Confederacy, combined the roles of a conventional navy, revenue service, and military logistics command."
The Department was instrumental in the liberation of Galveston, occupied by the Union, and winning the Battle of Galveston on January 1, 1862. It was disbanded at the end of the war.
References
Texas Marine Department Wikipedia(Text) CC BY-SA