Forrest's famous raid was in December 1862. That was before priosoner of war camps. In those ealry days of the War, prisoners were "paroled". They had to promise not to fight until exchanged for "prisoners" from the other side, and then sent home.

http://www.nps.gov/archive/vick/camptrail/sites/Tennessee-sites/Forrest'sRaidWTN.htm

Companies C and G of the 106th Illinois spent their parole in Benton Barracks, near St Louis. Here is an excerpt from some short articles I wrote for the Musick Family newsletter:

"About that time a call went out for more volunteers. Albert Cashier was still destitute, and he joined the 95th Illinois in Belvidere to get the large bonus they were offering. Logan County decided to form a regiment of its own. Samuel Musick and William H Musick joined the 106th Illinois Infantry, along with many of their cousins and in-laws. William’s uncle, Henry Johnson, was too old, so they made him a lieutenant. Just east, in DeWitt County, Isaac Wren joined the 107th. At Prairie Grove, Arkansas, Samuel Burton McFerrin’s company was transferred to the 9th Confederate Missouri Infantry, which was fired at by Jacob Birchler and Theodore Vogel in one of Missouri’s Union batteries. The 106th Illinois was sent to Jackson, Tennessee, to guard the Mobile & Ohio, Grant’s supply line. On December 18, 1862, Henry Johnson was sent with a small detail to guard a stretch of the railroad. Henry saw a stack of ties and told his men to build a makeshift blockhouse. The rest of company C and G were sent to Carroll Station. Grant and Sherman both thought that the best [cavalry] general on either side was Nathan Bedford Forrest. Forrest hit the M&O. Henry Johnson’s men defended one of only two stretches of the M&O not destroyed by Forrest. They did not suffer a single casualty. The remainder of companies C and G were captured and paroled to Benton Barracks, St Louis (named for Thomas Hart Benton), where they waited to be exchanged for Confederate prisoners. In Cass County, Missouri, Burton Litton McFerrin died at the age of 74."

Arleigh