"In early June, a part of two companies of the 89th Enrolled Missouri Militia had been activated and assigned to duty in Plattsburg and Ridgley. . . . .
"What we do know is that the Plattsburg fight was fought on the morning of July 21st, 1864. It was fought just outside of town, between elements of the 89th Enrolled Missouri Militia and provisional Confederate forces of Major John Thrailkill. . . . .
"By early July, the Company of the 89th EMM at Ridgley had been ordered to Plattsburg and the garrison now consisted of Company B (50 men) under the command of Captain Poe and Company E (50 men) under the command of Captain Turney. The entire garrison was under the command of Captain Poe.
http://www.plattsburgmo.com/History/1864BattleofPlattsburg.htm