Mexican civil war, Rebel General Miguel Miramon, blue=conservative rebels, red=liberal government:
"The Naval Action of Sixth March – 14, 24"
Known as the Battle of Antón Lizardo, off that town in the Gulf of Mexico, the US Navy intervened in a Mexican civil war, the Reform War.
The US sided with the liberal Mexican government against church supported rebels.
The results were instrumental in defeating the rebellion.
Captures yielded thousands of rifles & artillery shells, the loss of which forced defeat on Rebel General Miguel Miramon.
USS sloop of war Saratoga, which (among others) went with Perry to Japan in 1853, defeated Mexican rebels in 1860, captured the slaver Nightingale in 1861 and served in the Union blockading fleet:
Among the rebel ships captured was the Marquis of Havana a 680 ton single-screw bark-rigged armed steamer: 
In March 1861 Confederates purchased the Marquis of Havana, renamed it the CSS McRae, repaired & outfitted it as a gunboat, defending the lower Mississippi and providing cover for blockade runners.
In April 1862, at the Battle of Forts Jackson and St. Philip CSS McRae was severely damaged and scuttled.