From Tennesseans in the CIvil War

"Following the evacuation of Columbus, Kentucky, the regiment moved to Corinth, Mississippi, via Humboldt and Union City, and was heavily engaged in the Battle of Shiloh on April 6-7. At Shiloh, the brigade consisted of one battalion from Maney's 1st Tennessee, the 6th and 9th Tennessee, the 7th Kentucky Regiments, and Smith's Battery. Colonel Stephens was in command till 2:30 P.M. on April 6, when Colonel George Maney took over command. The regiment suffered casualties at Shiloh of nearly 500 men, and several companies reported the loss of their muster rolls and company records. "
Also you might crosscheck with the following:
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"There followed the retreat into Tennessee, and the Battle of Murfreesboro on December 31, 1862. Prior to this battle the 6th and 9th Tennessee Regiments were consolidated into one organization for field purposes, but continued to maintain separate muster rolls. They continued to act as a field unit until the end of 1864. In the battle, Maney's brigade consisted of the lst/27th, 4th Confederate, 6th/9th, (Colonel C. S. Hurt) Tennessee Regiments, 24th Battalion Tennessee Sharpshooters and Smith's Battery. The 6th/9th had 412 engaged, and lost 42 by casualties. "