the Confederate forces involved. The mosquito fleet could not match and after these ships successfully ran the Confederate batteries, and it was forced to retreat. Destruction Commander McBlair CSN at Memphis, being informed that New Orleans had fallen after the Battle of Forts Jackson and St. Philip, ordered the remaining Confederate vessels on the Mississippi to concentrate at Yazoo City, Mississippi, on the Yazoo River. He regarded this harbor as the only safe place remaining on the Mississippi River network for the Confederate Navy to maintain a base. This remaining refuge did not prove safe for long. In May 1863, Rear Admiral David Dixon Porter ordered a fleet under the command of Lieutenant-commander Walker to destroy Confederate commerce on the Yazoo River. This force consisted of , , , , and . With Forest Rose acting as a minesweeper, this force advanced steadily up the Yazoo River, from May 24–31. Fearing the capture of their vessels on the Yazoo, Confederate forces destroyed CSS Ivy, Star of the West, and the transports Arcadia and Magenta. References Abbreviations used in these notes Official atlas: Atlas to accompany the official records of the Union and Confederate armies. ORA (Official records, armies): War of the Rebellion: a compilation of the official records of the Union and Confederate Armies. ORN (Official records, navies): Official records of the Union and Confederate Navies in the War of the Rebellion. External links Video of the operation of a walking beam steam engine. Image of CSS Ivy. Charles Morfit and the Ivy. 1845 ships Gunboats of the Confederate States Navy Louisiana in the American Civil War Shipwrecks of the American Civil War Shipwrecks in rivers Maritime incidents in May 1863