April just got less crowded.
— The Civil War Guerrilla: Unfolding the Black Flag in History, Memory, and Myth
— Spring 1865: The Closing Campaigns of the Civil War
— Engineering Victory: The Union Siege of Vicksburg
— Civil War Infantry Tactics: Training, Combat, and Small-unit Effectiveness (the wider release could be any day now, but it's available from publisher LSU).
— The Great Missouri Raid: Sterling Price and the Last Major Confederate Campaign in Northern Territory (another one that's out now but hasn't made it to all retail outlets).