Trying to track McCray's 31s Arkansas Infantry. I know that it originated when Major Thomas Hamilton McCray was appointed to command a four-company battalion of Arkansas volunteers on January 25, 1862. During the next two months, five additional companies were added to McCray’s Battalion, and he was promoted to lieutenant-colonel. On May 25, 1862, a tenth company was added, and the battalion was reorganized as the 31st Arkansas Infantry Regiment on May 27, 1862. According to Sifakis the engagements for the 31st Start with Stone's River, Battle of Murfreesboro, but this doesn't really make a lot of sence. I would suspect that the unit was also either involved in the engagements around Corinth in the Summer of 1862 or was along for the Kentucky Campaign with the rest of McNair's Brigade.

Did McCray's Battalion have a number?
Did McCray's Battalion move to the Corinth area with the rest of Van Dorn's Army of the West?
Where was the 31st from May 1862 until Murfressboro?

Any help would be appreciated!