Sherman's most notable campaign involving railroad destruction was the March to the Sea in 1864. After capturing Atlanta in September of that year, Sherman led his army on a 600-mile march through Georgia to the Atlantic coast. Along the way, Sherman's troops systematically destroyed railroads, bridges, factories, and other facilities that contributed to the Confederate war effort.
Sherman's strategy was controversial and resulted in widespread devastation in Georgia. However, it also achieved its intended goal of weakening the Confederacy's transportation network and contributing to the Union victory in the Civil War.