Naval Battle of Campeche 30 April 1843 and 16 May 1843

The Mexican fleet now possessed the steam frigates Guadalupe and Montezuma.^[7] The Texas Navy commander Moore hoped to encounter the Guadalupe separate from her escort Montezuma.^[8][9] Austin and Wharton made for the Yucatán coast and encountered the Mexican squadron on 30 April 1843 between Lerma and Campeche. Montezuma and Guadalupe, along with four smaller vessels, comprised the Mexican fleet. The Texans were augmented by two Yucatecan ships and five small gunboats, but were clearly the smaller fleet. The Mexican shooting at first fell short and then went over the Texas ships. During the two-hour running battle the Austin was struck once in the fighting and lost some of her mizzen rigging and the Guadalupe had 7 dead and the Montezuma 13 dead. After a few hours, the Mexican sailing ships departed and only the two steamers remained. The result was that the Mexican blockade of the port of Campeche was lifted and the Texan ships put into the port for repairs.^[10] This first attack was a draw and the fleets separated.^[11]

The next event on 16 May 1843 was orchestrated by Commodore Moore and his "Texians" who lured the Mexican Forces into a narrow roadstead, and hounded the Mexican ships away from the harbour firing most of Austin's ammunition as Wharton was not able to engage. The battle toll came out as; "Austin" 3 dead, "Wharton" 2 dead, "Montezuma" 40 dead including her captain and "Guadalupe" 47 dead.{{Citation needed|reason=Casualties and losses in Naval Battle of Campeche listed Mexican numbered 30 killed and 55 wouded. This page claimed that the dead casualty reached 87. This an inconsistency.|09=April 2023}} The Mexican Fleet was effectively incapacitated. This battle would represent the only time that steam-driven warships would be defeated by sail powered ships.^[12] There were numerous falsehoods circulated about Moore's battle with Guadalupe. These seem to be largely the confections of the press, egged on by politicians, and are not to be taken seriously. They include claims to have sunk her.^[13]

After Campeche

On 4 June 1843, it was reported that the Texans caused serious damage to the vessel at the Naval Battle of Campeche. She was overhauled in the U.S. in 1844. On 26 February 1844 she once again sailed from Vera Cruz for Campeche. Next was another Atlantic Ocean crossing and on 15 August 1844 she arrived in Morocco. Next she on 17 August 1844 she sailed from Morocco for Tunis. Finally in August 1846 with Guadalupe she was sold to the Spanish Navy to become their first steam warships and delivered at Havana, Cuba. She was renamed Castilla at this time. She was used under Spanish service as dispatch vessel. In 1847 April she was the first Spanish steam warship to cross the Atlantic.^[14] In 1849, the Castilla and León were used with two other Spanish steam ships to intervene in Italy along with French forces during the suppressing of the Roman Republic (1849). The steam ships transported 9,000 troops to Italy and provided logistical support for them for months. The resulting recognition from the Pope, Sardinia, Prussia and Austria strengthened the Spanish government versus its rival Carlist faction.^[15]