I know this is an old post, but I would like to make a correction to my post. The following statement:

"To confuse matters even more, both McLain's 37th and Benton's 37th were at Corinth, MS, in May of 1862 when General Halleck was laying seige to the city."

Is incorrect. In May of 1862 McLain's 37th was training at Camp Whitfield, just outside of Columbus, Mississippi.

Kenny