Formation Date
- March 11, 1862
Dissolution Date
- June 26, 1862
Commanders
Significance
- Major General John C. Fremont was the only commander of the Army of the Mountain Department.
- The Mountain Department was created by President Abraham Lincoln’s Presidential War Order Number 3.
- The Army of the Mountain Department was an unofficial name that Major General John C. Fremont gave to the combined forces under his command in the Mountain Department.
- The Army of the Mountain Department fought in the Battle of McDowell and the Battle of Cross Keys.
- President Abraham Lincoln dissolved the Army of the Mountain Department by presidential proclamation on June 26, 1862.
