Here’s a table I created of the three brigades in Brig. Gen. John Buford’s 1st Cavalry Division for the Gettysburg Battle. The strength numbers are taken directly from the June 30, 1863 Present For Duty Rosters filled out by each regiment (making these numbers much more accurate than most other sources you see). The Rosters are courtesy of my old friend, the late George Rummel III. Also included are the casualty counts.
This table gives the student a clear idea of which companies were detailed to various duties, and the “strength on the line” of each regiment.
ARMY OF THE POTOMAC CAVALRY CORPS
Brigadier General John Buford
All “strength” numbers denote fighting effectives, taken from the actual June 30, 1863
“Present for Duty” rosters, courtesy of George A. Rummel III.
These numbers, as well as the casualty counts, are much more accurate than any other source commonly available.
Colonel William Gamble
8th New York
Colonel Thomas Casimer Devin
6th New York
9th New York
3rd West Virginia
Regulars – Reserve Brigade
Brigadier General Wesley Merritt
1st United States
2nd United States
5th United States
6th United States