English: Map of battlefield core and study areas. The ABPP revised the 1993 Study Area to include the retreat route of Confederate forces from Kirksville down towards New Cambria to incorporate fighting that took place on August 8 and 9. The Federal approaches to New Cambria along the railroad were also added. These troops stumbled into Porter’s scouts east of New Cambria and initiated the two-day running engagement back up the Chariton River. The Core Areas were revised to represent the initial expulsion of Porter’s Confederates from Kirksville by a smaller but better trained and well-equipped Federal force on August 6, the rearguard ambush at Painter's Creek on August 8, a second rearguard action at Walnut Creek in the early morning hours of August 9, and the final skirmish which took place later that day at Seesford as Confederate forces retreated across the Chariton River.