United States Army > Army of the Potomac > 5th Corps


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Commanded by Brigadier General Joseph J. Bartlett

On March 23 the First Division was reorganized along with the rest of the Army of the Potomac. The First Brigade was split up between the Second and Third Brigades and a new Fourth Brigade was organized from the First and Third Brigades of the Second Division.

First Brigade Colonel W. S. Tilton (to 3/25)
18th Massachusetts Infantry Regiment to 3 Brig. (below)
22nd Massachusetts Infantry Regiment to 2 Brig. (below)
1st Michigan Infantry Regiment Lieutenant Colonel William A. Throop to 3 Brig. (below)
118th Pennsylvania Infantry Regiment Lieutenant Colonel James Gwynn to 3 Brig. (below)
Second Brigade Colonel J. B. Sweitzer
Colonel J. Hayes
9th Massachusetts Infantry Regiment Colonel Patrick R. Guiney (after 2/3)
22nd Massachusetts Infantry Regiment from 1 Brig. (above)
32nd Massachusetts Infantry Regiment Lieutenant Colonel Luther Stephenson
4th Michigan Infantry Regiment Lieutenant Colonel George Lumbard
62nd Pennsylvania Infantry Regiment Lieutenant Colonel James C. Hull
Third Brigade Colonel J. Hayes
20th Maine Infantry Regiment
18th Massachusetts Infantry Regiment from 1 Brig. (above)
1st Michigan Infantry Regiment Lieutenant Colonel William A. Throop from 1 Brig. (above)
16th Michigan Infantry Regiment Lieutenant Colonel Norval E. Welch
44th New York Infantry Regiment Lieutenant Colonel Freeman Conner
83rd Pennsylvania Infantry Regiment Major William H. Lamont
118th Pennsylvania Infantry Regiment Lieutenant Colonel James Gwynn from 1 Brig. (above)
Fourth Brigade Brigadier General Romeyn Ayers organized 3/25

140th New York Infantry Regiment

Lieutenant Colonel Louis Ernst from 2 Div. 3 Brig.

146th New York Infantry Regiment

Colonel David T. Jenkins from 2 Div. 3 Brig.

91st Pennsylvania Infantry Regiment

Lieutenant Colonel Joseph H. Sinex from 2 Div. 3 Brig.

155th Pennsylvania Infantry Regiment

Lieutenant Colonel John H. Cain from 2 Div. 3 Brig.
2nd United States Infantry Regiment Captain Samuel A. McKee from 2 Div. 1 Brig.

11th United States Infantry Regiment

Major DeLancey Floyd-Jones from 2 Div. 1 Brig.

12th United States Infantry Regiment

Captain Thomas S. Dunn from 2 Div. 1 Brig.

14th United States Infantry Regiment

Major Grotius R. Giddings from 2 Div. 1 Brig.

17th United States Infantry Regiment

Lieutenant Colonel James D. Greene from 2 Div. 1 Brig.