Texas Historical Marker

Brazos Santiago Pass and Brazos Island Military Depot

South Padre Island · Cameron County · placed 1996

Texas RevolutionCivil War

Hear Duane tell it

Cameron County, Texas

Duane's take

Here's what the official marker has to say, and I'll tell it to you the way it deserves to be told. Brazos Santiago Pass — named by the Spanish — is a narrow passageway reaching inward from the sea, tucked between Brazos Island and Padre Island down in Cameron County. Now, the channel there had a habit of changing depths, which meant the big vessels couldn't get through.

But smaller ships? They found it just fine. And that seclusion, that geographic quirk, made the whole area worth fighting over — more than once, as it turns out.

More than once. Brazos Santiago harbor first got pulled into the Texas Revolution in April of 1836, when the Texas warship Invincible heavily damaged the Mexican warship Bravo right there in those waters. Supplies bound for the Mexican Army never reached their destination.

Just like that, a narrow pass between two barrier islands changed the shape of a war. Then came 1846, and U.S. Army General Zachary Taylor set up a military depot at the mouth of Brazos Santiago Pass, right there on Brazos Island.

During the war with Mexico, thousands of volunteers were encamped on that island, waiting to be transferred to other locations. Thousands of men, sitting on a sliver of land between the Gulf and the pass, biding their time. Fast forward to February 1861, before the Civil War had even officially broken out, and the U.S.

Army surrendered that same depot to forces of the state of Texas. Then in 1863, Federal soldiers landed unopposed at Brazos Island, taking Fort Brown and Brownsville — only to abandon them less than a year later. And if you thought the story was winding down, well — in May of 1865, the last battle of the entire Civil War was fought at nearby Palmito Ranch.

After all of that — revolutions, invasions, surrenders, the final shot of the bloodiest war this nation ever knew — what finally finished off the Brazos Island Military Depot? A hurricane. 1867. Sometimes the Gulf of Mexico gets the last word.

What the marker says

Named by the Spanish, Brazos Santiago Pass is a narrow passageway extending inward from the sea. The pass lies between Brazos Island and Padre Island. The changing depths of the pass channel kept large vessels from entering, but offered seclusion to smaller ships. The entire area proved strategically important in a variety of military conflicts. Brazos Santiago harbor became part of the Texas revolution when the Texas warship "Invincible" heavily damaged the Mexican warship "Bravo" in April 1836. Supplies bound for the Mexican Army did not reach their destination. In 1846, U. S. Army General Zachary Taylor set up a military depot at the mouth of Brazos Santiago Pass on Brazos Island. during the war with Mexico, thousands of volunteers were encamped here, awaiting transfer to other locations. In February 1861, the U. S. Army surrendered the depot to forces of the stat eof Texas prior to the outbreak of the Civil War. Federal soldiers landed unopposed in 1863 at Brazos Island, taking Fort Brown and Brownsville, only to abandon them less than a year later. In May 1865, the last battle of the Civil War was fought at nearby Palmito Ranch. The depot was abandoned following hurricane damage in 1867. (1996)

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