stops at numerous South American ports, the squadron transited the Strait of Magellan and arrived at Valparaíso in late March 1866 as a Spanish squadron was preparing to bombard the undefended town, contrary to international law, during the Chincha Islands War. Commodore John Rogers, commander of the American squadron, attempted to persuade Admiral Casto Méndez Núñez to forego the bombardment, but the latter claimed it was a point of Spanish honor. Rogers even had his ships clear for action in an unsuccessful attempt to intimidate Méndez Núñez and was prepared to open fire if he received support from the small British squadron in the harbor. That was not forthcoming as the British minister in the town forbade Rear-Admiral Joseph Denham to act and Rogers was forced to stand down. Monadnocks arrival at Acapulco coincided with a Mexican siege of the town's French defenders during the Second French intervention in Mexico. The squadron continued on to San Francisco, anchoring off that city on 21 June. On 26 June she proceeded to Vallejo, and entered the Mare Island Navy Yard where she was decommissioned on 30 June. Eight years later, her wooden hull was rotting and she was sold for scrap. Although Congress was informed by the Navy Department that the Civil War-era ship was being repaired, a new iron-hulled monitor of the same name was built with repair money and the proceeds of her sale because Congress refused to fund any new construction at this time. References Bibliography Miantonomoh-class monitors Ships built in Boston 1863 ships Ships of the Union Navy American Civil War monitors of the United States