III Corps (Union Army)

III Corps (Union Army)

There were four formations in the Union Army designated as III Corps (or Third Army Corps) during the American Civil War.

Three were short-lived:

• In the Army of Virginia:
  • Irvin McDowell (June 26, 1862 – September 5, 1862);
  • James B. Ricketts (September 5, 1862 – September 6, 1862);
  • Joseph Hooker (September 6, 1862 – September 12, 1862)

• In the Army of the Ohio:
  • Charles C. Gilbert (September 29, 1862 – October 24, 1862)
• In the Army of the Cumberland:
  • Charles C. Gilbert (October 24, 1862 – November 5, 1862)

The other, the III Corps, Army of the Potomac (March 13, 1862 – March 24, 1864), is the subject of this article.