During the Civil War, the rail line was strategic to both the Union and Confederate armies. The Tennessee campaigns of 1862 and 1863 saw Union troops force the Confederates from Nashville all the way to Chattanooga, down the line of the railroad. The tracks and bridges were repeatedly damaged and repaired, and the rolling stock was largely destroyed. At different times the trains carried supplies for both armies. In 1885, the railroad successfully defended itself before the Supreme Court in "Nashville, C. & St. L. R. Co. v. United States" from repaying postage payments for mail in 1861 that was not delivered because of the war.