of 1,000 Union troops on Mustang Island, Aransas Pass, Texas on November 16–17 and supporting a Union reconnaissance at Pass Cavallo on the gulf shore of Matagorda Peninsula from December 31, 1863, to January 1, 1864. She returned to blockade off Mobile, soon after, stopping numerous blockade runners throughout the spring and summer of 1864. On July 15, the warship's boats conducted a reconnaissance of the Mobile Bay area to determine the Confederate torpedo (naval mines) defenses; and then on August 3, Admiral Farragut took his stripped-for-action squadron of 18 ships, including four monitors, against those defenses. In the fierce fight and great victory that followed, Monongahela bombarded Confederate forts and then rammed the heavy Confederate ram Tennessee. The sloop succeeded only in damaging herself in the full speed drive into the armored enemy ship, but combined heavy gunfire from the other Union ships forced the Confederate warship to surrender, ending the battle and closing the last major gulf port to the South. Monongahela remained on duty with the West Gulf squadron until the end of the Civil War. Post-war career Post-war, Monongahela was assigned to the West Indies Squadron. While on service with the West Indies Squadron, the warship had the unique experience of being landed high and dry 91 meters inland from the shoreline when a tsunami struck Frederiksted, St. Croix on November 18, 1867. Following an earthquake, and probable submarine landslide from the 15,000' deep trench to the North, she was hit by a wall of water to high and carried over the beach and warehouses to come to rest on an even keel some distance from the water. A working party of mechanics from New York Navy Yard under Naval Constructor Thomas Davidson succeeded in refloating the ship on May 11, 1868, following a four-month endeavor. Monongahela was towed to New York City and thence to Portsmouth where she was slowly repaired, finally departing in 1873 to join the South Atlantic Station. Following a three-year cruise on that duty, the steam sloop served as a training ship off the east coast and then departed for the Asiatic Station, serving in the Far East until the need of repairs took her to Mare Island Navy Yard in 1879 where she decommissioned. In 1883, the veteran warship was converted to a supply ship, with all her machinery being removed that fall to make additional room for supplies. During