On 15 July, the Confederate ironclad ram "Arkansas", built at Memphis and completed at Yazoo, Mississippi, raced down the Yazoo River and fought through the combined Union squadrons to shelter under the guns at Vicksburg. At the first sight of "Arkansas", "Lancaster" tried to ram the southern ship; but when she was a mere 100 yards from her quarry, a broadside from the ironclad opened up her lines and made her unmanageable. As "Lancaster" drifted downstream, "Queen of the West" caught her and towed her to safety. The following day ram "Mingo" came alongside and took "Lancaster" to Memphis for repairs.