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,
Campaigns of the American Civil War Campaigns of the American Civil War The campaigns of the American Civil War are categorized in various ways. The U.S. Army Institute of Heraldry has identified 25 campaigns that are used for streamers, decorative devices attached to unit flags that denote participation in historic battles or campaigns. (An alternative campaign categorization is that of the National Park Service, charged with maintaining Civil War battlefields and other historic sites. This categorization is more detailed and inclusive than the Army heraldry version, particularly for actions outside the Eastern Theater and Western Theater; see .) The Civil War campaign streamers are equally divided