Army of Tennessee was created in 1862.
In 1862
In 1862.
Major General Irvin McDowell actually had two stints as commander of the Union Army. The first was from March 13, 1862 until April 4, 1862. The second was from June 26, 1862 _ September 5, 1862.
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Army of Northern Virginia (1861-1862),
VII Corps - Union Army - was created in 1862.
XII Corps - Union Army - was created in 1862.
XVIII Corps - Union Army - was created in 1862.
VIII Corps - Union Army - was created in 1862.
VI Corps - Union Army - was created in 1862.
York U.S. Army Hospital was created in 1862.