Montana in the American Civil War Montana in the American Civil War The area that eventually became the U.S. state of Montana played little direct role in the American Civil War. The closest the Confederate States Army ever came to the area was New Mexico and eastern Kansas, each over a thousand miles away. There was not even an organized territory using "Montana" until the Montana Territory was created on May 26, 1864, three years after the Battle of Fort Sumter. In 1861, the area was divided between the Dakota Territory and the Washington Territory, and in 1863, it was part of the Idaho Territory. Nevertheless,
Western Theater of the American Civil War overland route from Pensacola and started besieging Fort Blakely. On April 8, Union forces opened an artillery bombardment on Spanish fort with ninety field pieces, followed by an infantry attack which overwhelmed the Confederate defenders. Canby then moved against Fort Blakely the next day, overrunning that fort as well. These battles forced the Confederate commander of Mobile, Maj. Gen. Dabney H. Maury, to evacuate the city. When he received word of Lee's and Johnston's surrenders, Lt. Gen. Richard Taylor, commander of the Confederate Department of Alabama, Mississippi, and East Louisiana, surrendered his forces to Canby on May 4, while Forrest