At the Battle of Chickamauga, his division of the XX Corps formed part of the command of Maj. George Henry Thomas on the Union left. During the Battle of Chattanooga, his division was one of the several that charged up Missionary Ridge. The next year he commanded a division in the Army of the Cumberland during the invasion of Georgia and was severely wounded at the Battle of New Hope Church on May 28, 1864.In the midst of the battle of Utoy Creek, Johnson assumed command of the XIV Corps when the previous commander, John M. Palmer, abruptly resigned due to a rank dispute. Johnson briefly led the corps through the rest of August. Cavalry service On August 22, 1864 Johnson was made chief of cavalry of the Military Division of the Mississippi. He commanded a cavalry division at the Battle of Nashville. On the second day of the battle, Johnson was given the brevet rank of major general of volunteers, supplemented on March 13, 1865 by the brevet rank of brigadier general in the regular army, and on the same day was brevetted major general in the regular army for "gallant and meritorious services during the war". Johnson was left behind when Maj. Wilson began his raid into Alabama in 1865.
Post war Johnson was mustered out of the volunteer service on January 15, 1866, and became provost marshal general of the Military Division of the Tennessee, and later acting judge advocate in various military departments. He resigned in 1867 with the rank of major, which grade by an Act of Congress (March 3, 1875) was changed to that of brigadier general. He published A Soldier's Reminiscences in Peace and War (1866) and a Memoir of Major General George H. On December 6, 1865, Johnson was elected as a Veteran Companion of the Pennsylvania Commandery of the Military Order of the Loyal Legion of the United States (MOLLUS), a military society of officers who had served in the Union armed forces during the Civil War.
He was assigned MOLLUS insignia number 99. Johnson ran for Governor of Minnesota in 1881 as a Democrat, but lost to Republican Lucius Frederick Hubbard; he received about 35% of the vote.
 Johnson died on April 21, 1897 in Saint Paul, Minnesota, and is buried there in Oakland Cemetery. This item is in the category "Collectibles\Autographs\Military". The seller is "civil_war_photos" and is located in this country: US. This item can be shipped worldwide.