"[48]  Harrison led the brigade at the Battle of Nashville in December, in a "decisive" action against the forces of General John Bell Hood.[49][50] Notwithstanding his memorable military achievements and the praise he received for them, Harrison held a dim view of war; according to historian Allan B. Spetter he thought "war was a dirty business that no decent man would find pleasurable."[47] Later in 1888, the year he won the presidency, Harrison declared: "We Americans have no commission from God to police the world."[51]
Several weeks after the Battle of Nashville, Harrison "received orders to rejoin the 70th Indiana at Savannah, Georgia, after a brief furlough in Indianapolis"; however he caught scarlet fever and was delayed for a month, and then spent "several months training replacement troops in South Carolina."[48]
On January 23, 1865, Lincoln nominated Harrison to the grade of brevet brigadier general of volunteers, to rank from that date, and the Senate confirmed the nomination on February 14, 1865.[52] Harrison was promoted because of his success at the battles of Resaca and Peachtree Creek.