. "300"^^ . "USS Pembina was a Unadilla-class gunboat built for the Union Navy during the American Civil War. She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries."@en . . . . "USS Pembina was a Unadilla-class gunboat built for the Union Navy during the American Civil War. She was used by the Navy to patrol navigable waterways of the Confederacy to prevent the South from trading with other countries."@en . "USS Pembina under construction at the shipyard of Thomas Stack, 1861"@en . . . . . . . . . . . "--10-16"^^ . . . "USS Pembina (1861)"@en . .