April 2 The survivors of the regiment [12th Miss.] were under the command of Lt. Colonel James H. Duncan of the 19th Mississippi. They were ordered to leave the Swift Run line and double timed to Petersburg to fill a gap in General Wilcox’s line, then placed in Battery Gregg to slow the Federal breakthrough. After a desperate defense that caused high Federal casualties the battery was taken and its entire garrison killed or captured.
http://civilwarintheeast.com/confederate-regiments/mississippi/12th-mississippi-infantry-regiment/

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12th Mississippi Infantry - Commander: Captain Archie K. Jones (April 2, 1865)
http://www.beyondthecrater.com/resources/units/conf-u/conf-inf/ms-inf/12th-mississippi-infantry/

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Archibald K. Jones, 21, Private, Company K, 12th Mississippi Infantry, enlisted May 8, 1861 at Port Gibson by Capt. Hughes for 1 year, wounded near Richmond, Va. in engagements June 26 to July 1, 1862, recorded as Captain at the end of year, 1862 muster, gun shot wound right leg in battle near Bristoe Station, Va. October 14, 1863, captured at Davis Farms/Weldon RR, August 21, 1864, sent to Fort Delaware August 27, paroled October 22, 1864, exchanged November 25, captured at Fort Gregg, Va. April 2, 1865, sent to Johnson’s Island from Old Capitol Prison, Washington, D. C. April 9, released on Oath June 18, 1865, age 26, resident of Crystal Springs/Port Gibson, Miss., fair complexion, dark hair, hazel eyes, 5’ 8”

Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Mississippi