Complex sentence: The only Civil War conflicts in Indiana was the Newburgh Raid, a bloodless capture of Newburgh, Indiana, and the Battle of Corydon, which occurred during Morgan's Raid and left 15 dead, 40 wounded, and 355 captured.
Split into simpler sentences: The only Civil War battle fought in Indiana was the Battle of Corydon, which occurred during Morgan's Raid. The battle left 15 dead, 40 wounded, and 355 captured.