After just two months of training the 31st’s first battle was at Belmont, Missouri in November. Grant complimented both the regiment and its commander. In February 1862 Logan and his regiment distinguished themselves at the Battle of Ft. Donelson, Tennessee. Logan, wounded three times in this battle, spent three weeks in a field hospital before returning home to recuperate. Gen. Grant recommended his promotion to Brigadier General for his actions. On Logan’s return to active duty as a general he commanded five regiments and took part in the Siege of Corinth.