Beginning March 7, and ending April 30, 1863, Calvin under the command of General Grant began his travel of nearly 300 miles in the area of Southern Tennessee, Northern Mississippi, and Northeastern Alabama. He traveled from the Tennessee towns of Bolivar, Middleburg and Davis Mills by foot and train on their way Corinth, Mississippi a distance of approximately 75 miles. From Corinth, the troops traveled by train north another 55 miles to Jackson, Tennessee, and camped 20 miles south of Jackson. At Jackson, Calvin is detailed to travel by horse Southeast to Purdy, Tennessee a distance of approximately 35 miles. At Purdy, Calvin witnessed the burning of the city at the order of Colonel Fielding Hurst. Calvin again boarded a train to return to Corinth for another 25 miles and camped 8 miles south at Biggersville, Mississippi. Calvin then traveled by foot to Burnsville and East Port, Mississippi and then to Tuscumbia, Alabama all on or near the Tennessee River for a distance of nearly 55 miles. Calvin then returned to Corinth, Mississippi for a distance of nearly 55 miles.