All strength are Present for Duty Equipped (except part of the staff) taken from OR 14:238 (situation at 20 June 1862).

The calculations behind this table are somewhat complicated, since apparently a number of detached units were still counted within their old command.

Field artillery: the aggregate of Corps reserves (Bartlett, De Russy, West and Hunt) is 3,197 men with 164 guns; average 19.5 men per gun, rounded to 20 men per gun.

U.S.V. cavalry: the aggregate of Corps reserves (Averell, Gregg, Farnsworth, McReynolds) is 2,906 men in 48 companies; average 60.5 men per company, rounded to 60.

Staff: my assessments (when strength not reported) are 6 men for each division and 3 men for each brigade.

Divisional details are:

• Richardson: Pfde 8,145 men, 140 co.inf + 1 co.cav + 3 co.art, 16 guns (minus 1 co.art, 4 guns, detached to Casey); staff 6 + 3 x 3 = 15 men; artillery 12 x 20 = 240 men; artillery detached 4 x 20 = 80 men; cavalry 60 men; infantry 8,145 - 15 - 240 - 80 - 60 = 7,750 men.

  Note: according to Dyer, the battery with Casey (F, 1st N.Y.) was detached from Slocum's division. However I decided for the solution shown above, since otherwise (according to the OR table) Richardson would have had four guns too much, and Slocum four guns too few.

• Sedgwick: Pfde 8,681 men, 122 co.inf + 1 co.cav + 2 co.art, 12 guns; staff 6 + 3 x 3 = 15 men; artillery 12 x 20 = 240 men; cavalry 60 men; infantry 8,681 - 15 - 240 - 60 = 8,366 men.
• Hooker: Pfde 8,976 men, 150 co.inf + 2 co.art, 10 guns (plus 1 co.art, 6 guns, detached from Hunt); staff 6 + 3 x 3 = 15 men; artillery 10 x 20 = 200 men (plus 6 x 20 = 120 men, aggregate 320 men); infantry 8,976 - 15 - 200 - 60 = 8,761 men.
• Kearny: Pfde 8,323 men, 150 co.inf + 2 co.art, 12 guns; staff 6 + 3 x 3 = 15 men; artillery 12 x 20 = 240 men; infantry 8,323 - 15 - 240 = 8,068 men.
• Couch: Pfde 8,314 men, 140 co.inf + 1 co.cav + 2 co.art, 7 guns; staff 6 + 3 x 3 = 15 men; artillery 7 x 20 = 140 men; cavalry 60 men; infantry 8,314 - 15 - 140 - 60 = 8,099 men.
• Peck: Pfde 5,248, 130 co.inf + 1 co.cav + 2 co.art, 9 guns; staff 6 + 2 x 3 = 12 men; artillery 9 x 20 = 180 men; cavalry 60 men; infantry 5,248 - 12 - 180 - 60 = 4,996 men.
• Morell: Pfde 12,011 men, 162 co.inf (minus 20 co.inf detached to Stoneman) + 4 co.art, 24 guns; staff 6 + 3 x 3 = 15 men; artillery 24 x 20 = 480 men; aggregate infantry 12,011 - 15 - 480 = 11,516 men; detached infantry 11,516 x 20/162 = 1,424 men; remaining infantry 11,516 x 142/162 = 10,092 men.
• Sykes: Pfde 5,745 men, 95 co.inf + 12 heavy artillery companies (all detached, seven to Hunt and five to Casey) (plus 2 co.art, 12 guns, detached from Hunt); staff 6 + 3 x 3 = 15 men; heavy artillery 1,400 men (OR 12:339) (to Hunt: 1,400 x 7/12 = 817 men; to Casey: 1,400 x 5/12 = 583 men); field artillery 0 (plus 12 x 20 = 240 men); infantry 5,745 - 15 - 1,400 = 4,330 men.
• McCall: Pfde 9,501 men, 126 co.inf (minus 10 co.inf detached to Casey) + 8 co.cav + 4 co.art, 22 guns; staff 6 + 3 x 3 = 15 men; artillery 22 x 20 = 440 men; cavalry 8 x 60 = 480 men; aggregate infantry 9,501 - 15 - 440 - 480 = 8,566 men; detached infantry 8,566 x 10/126 = 681 men; remaining infantry 8,566 x 116/126 = 7,885 men.
• Hunt: Pfde 2,108 men, 24 co.art, 108 guns (minus 4 co.art, 24 guns, detached to Hooker, Sykes and Stoneman) (plus five companies heavy artillery detached from Sykes); staff 3 men (notwithstanding the division of Reserve into five brigades, total force was comparable to a single infantry or cavalry brigade); detached field artillery 24 x 20 = 480 men; heavy artillery 0 (plus 817 men, see Sykes); remaining field artillery 2,108 - 3 - 480 = 1,625 men.
• Slocum: Pfde 9,246 men, 120 co.inf + 3 co.art (18 guns); staff 6 + 3 x 3 = 15 men; artillery 18 x 20 = 360 men; infantry 9,246 - 15 - 360 = 8,871 men.
• Smith: Pfde 9,308 men, 140 co.inf + 2 co.cav + 4 co.art (22 guns); staff 6 + 3 x 3 = 15 men; artillery 22 x 20 = 440 men; cavalry 2 x 60 = 120 men; infantry 9,308 - 15 - 440 - 120 = 8,733 men.
• Cooke: Pfde 2,087 men, 45 co.cav (20 U.S.V. + 25 U.S.) with many detachments. staff 6 + 2 x 3 = 12 men; U.S.V. cavalry 20 x 60 = 1,200 men; U.S. cavalry 2,087 - 12 - 1200 = 875 men (average of 35 men per company). Individual detachments are:
  • With the army: 6 USV.co (BCEFGH/6th Pa.) + 9 US.co (1st U.S. & half/5th U.S.) 6 x 60 + 9 x 35 = 675 men.
  • With Stoneman: 4 USV.co (ADIK/6th Pa.) + 16 US.co (1st & 6th U.S.) 4 x 60 + 16 x 35 = 800 men.
  • With Dix (at Williamsburg and Yorktown): 10 USV.co (5th Pa.) 10 x 60 = 600 men.
• Staff etc.
  • Staff proper: Army and Corps 88 men (mostly listed as Pfd but not as Pfde) + 174 men listed above = 262 men.
  • Escort and Orderlies: Pfde cavalry 102 men.
  • Provost Guard and HQ Guard: Pfde 927 men, 2 USV.cav.co + 7 US.cav.co + 9 inf.co; cavalry 2 x 60 + 7 x 35 (as per Cooke above) = 365 men; infantry 927 - 365 = 562 men.
  • Engineers: U.S. 194 men, U.S.V. 1,317 men; aggregate infantry including Guard 194 + 1,317 + 562 = 2,073 men.
• Stoneman:
  • 18th Mass. & 17th N.Y. (detached from Morell) 1,424 men.
  • Artillery (detached from Hunt) 120 men.
  • 6th Pa. Cavalry, 1st U.S. Cavalry and 6th U.S. Cavalry (detached from Cooke) 800 men.
  • 5th U.S. Cavalry: the table in OR 14:238 shows but 62 Pfde men in Stoneman's command. Very puzzling. After some reflection I decided these men represent two companies (5 officers Pfd being too much for a single company) of 5th U.S. (three others being initially with Casey). I have absolutely no evidence for this; it's pure guess. Initial 62 men plus 3 x 35 men = 167 men. Aggregate cavalry 800 + 167 = 967 men.
• Casey: Pfde 1,093 men (listed as "Quartermaster Guard"), 6 co.inf (plus 10 detached from McCall) + 9 USV.co.cav + 3 US.co.cav (all detached to Stoneman (plus 1 co.art, 4 guns, detached from Richardson, and 5 heavy artillery companies detached from Sykes); cavalry 9 x 60 + 3 x 35 (as per Cooke above) = 645 men (540 men present, 105 detached to Stoneman); infantry 1,093 - 645 = 448 men (plus 681 men from McCall = 1,129 men); field artillery (detached from Richardson) 4 x 20 = 80 men; heavy artillery (detached from Sykes) 583 men.

All strength are Present for Duty, mainly derived from Livermore (p.84) but with some variations (notably for Longstreet division).

Officers: As a rule, Confederate strength reports (unless the contrary is explicitly stated) do not include officers (nor cavalry, nor artillery). Livermore adds 3,500 officers to a total of 51,908 men (from 1,201 companies) deducted from the OR reports. I have slightly raised this rate to 3 officers per company, since the single lone confederate report mentioning them (Wise's brigade, OR 13:916) lists 62 officers against 20 infantry companies.

Artillery: Livermore adds 1,500 officers and men to the above (from 40 companies) which seems quite a bit on the lower side. Reports detailing battery strength can be found in OR 13:912 (Holmes), 13:916 (Wise) and 14:689 (S. D. Lee). Leaving apart the statistical flukes (much too low: Graham's; much too high: Carlton's and Woolfolk's) and adding two guns to Woolfolk (as per OR 13:542) the remaining 18 batteries have 73 guns and 1,241 effective men, average 4.0 gun per battery and 17.0 men per gun (18 men Pfd, including officers and rounded). I assigned 4 guns to each battery whose pieces are not detailed in OR (with the ecception of some unit listed in OR 14:615, put at 3, 5 or 6 guns according to their personnel strength and average of men per gun) but only 2 guns to the units training at Camp Lee.

Cavalry: calculated on Stuart's average of 47 men per company (see below).

Staff: my assessments (when strength not reported) are 6 men for each division and 3 men for each brigade (Jackson's and Magruder's "Commands", being ad-hoc units, did not qualify for extra staff). Army and Department staff I put at 20 men (my guess).

Divisional detail are:

• Jackson: infantry 1,122 Eff (Winder) + 4,527 Eff (Jones and Fulkerson) + 3,500 Eff (Lawton), as per Livermore, plus 3 * 173 = 519 officers, aggregate infantry 9,668 men; artillery 18 x 18 = 324 men; divisional aggregate 9,992 men.
• Ewell: infantry 6,825 Eff as per Livermore, plus 3 x 165 = 495 officers, aggregate infantry 7,320 men; cavalry 47 men; Artillery 16 x 18 = 288 men. Divisional aggregate 7,655 men.
• Whiting: infantry 3,963 Eff (Hood and Law) + 219 Eff (Hampton's Legion) as per Livermore, plus 3 x 89 = 267 officers, aggregate infantry 4,449 men; artillery 8 x 18 = 144 men; divisional aggregate 4,593 men.
• Cavalry, Jackson's Command: cavalry 12 x 47 = 564 men.
• Magruder: infantry 89/277 x 13,000 (Magruder's Command, as per OR 13:661) = 4,177 Eff, plus 3 x 89 = 267 officers, aggregate infantry 4,444 men; artillery 8 x 18 = 144 men; divisional aggregate 4,588 men.
• Jones: infantry 89/277 x 13,000 (as per above) = 4,177 Eff, plus 3 x 89 = 267 officers, aggregate infantry 4,444 men; artillery 16 x 18 = 288 men; divisional aggregate 4,732 men.
• McLaws: infantry 99/277 x 13,000 (as per above) = 4,646 Eff, plus 3 x 99 = 297 officers, aggregate infantry 4,943 men; artillery 9 x 18 = 162 men; divisional aggregate 5,105 men.
• Artillery, Magruder's Command: artillery 26 x 18 = 468 men.
• Longstreet: Livermore lists 8,661 effective infantry, which seems unduly low. Army strength for 20 July (as per OR 14:645) for the divisions of D. H. Hill (including Wise's brigade), McLaws (including the former Magruder's one), A. P. Hill, Anderson (former Huger's), Jones and Whiting shows a total of 41,664 Pfd + 12,877 infantry losses during the Seven Days (as per OR 13:973 et seq.) = 54,541 Pfd before battle; this is 105.2% of the 51,855 infantry Pfd calculated here (the difference being the slightly wounded men returned to the ranks); individual divisional vales range from 98.5% to 125.3%. But Longstreet division on 20 July had 8,514 men and had previously suffered 4,430 infantry losses, aggregate 12,944, half as much as Livermore's. To reach the 105.1% average requires a raise of his values by a 1/3 factor, which I employed.

  infantry 8,661 Eff (as per Livermore) x 4/3 (as per above) = 11,545 Eff, plus 3 x 257 = 771 officers, aggregate infantry 12,316 men (105.1% of 12,944); artillery 39 x 18 = 702 men; divisional aggregate 13,018 men.

• Huger: infantry 1,800 (Mahone, as per OR 13:796) + 2,000 (Wright, as per OR 13:806) + 2,128 (Armistead, at the divisional average of 38 men per company) = 5,928 Eff, plus 3 x 156 = 468 officers, aggregate infantry 6,396 men; artillery 21 x 18 = 378 men; divisional aggregate 6,774 men.
• D. H. Hill: infantry 10,000 Eff as per Livermore, plus 3 x 233 = 699 officers, aggregate infantry 10,699 men; artillery 20 x 18 = 360 men; divisional aggregate 11,059 men.
• A. P. Hill: infantry 14,000 Eff as per Livermore, plus 3 x 284 = 852 officers, aggregate infantry 14,852 men; artillery 41 x 18 = 738 men; divisional aggregate 15,590 men.
• Holmes (engaged): infantry 3,000 (Ransom, as per 13:794) + 1,570 (Daniel, as per OR 13:906) + 3,600 (Walker, as per OR 13:906) = 8,170 Eff, plus 3 x 134 = 402 officers, plus 62 officers and 752 men (Wise, as per OR 13:916), aggregate infantry 9,386 men; Cavalry 130 Eff (Daniel, as per OR 13:906), plus 3 x 3 = 9 officers, plus 3 x 47 (Ransom and Walker), aggregate cavalry 280 men; artillery 296 (Holmes, as per OR 13:912), plus 3 x 4 = 12 officers, plus 17 losses during the Seven Days, plus 6 officers and 141 men (Wise, as per OR 13:916), aggregate artillery 472 men; divisional aggregate 10,138 men.
• Stuart: cavalry 301 officers + 3,740 men (Pfd 20 July, as per OR 14:645), + 71 losses (as per OR 13:984), aggregate 4,112 men (referred to 90 companies, average 45.7 men per company); artillery 4 x 18 = 72 men; aggregate 4,184 men.
• Pendleton: artillery 80 x 18 = 1,440 men.
• Staff: army 20 men; Jackson 6 + 4 x 3 = 18 men; Ewell 6 + 4 x 3 = 18 men; Whiting 6 + 2 x 3 = 12 men; Magruder 6 + 2 x 3 = 12 men; Jones 6 + 2 x 3 = 12 men; Mclaws 6 + 2 x 3 = 12 men; Longstreet 6 + 6 x 3 = 24 men; Huger 6 + 3 x 3 = 15 men; D. H. Hill 6 + 5 x 3 = 21 men; A. P. Hill 6 + 6 x 3 = 24 men; Holmes 6 + 4 x 3 = 18 men; Stuart 3 men; aggregate 209 men.
• Holmes (not engaged): infantry 1,047 Eff (20/30 of Daniel) plus 3 x 20 officers, plus 62 officers and 752 men (Wise, as above), aggregate infantry 1,921 men; artillery 144 (as per OR 13:912), plus 3 * 2 officers, plus 6 officers and 141 men (Wise, as above), aggregate artillery 472 men; divisional aggregate 2,218 men.

• Richmond Defenses: field artillery 28 x 18 = 504 men; Camp Lee 26 x 18 = 468 men; heavy artillery 33 companies x 50 men (my guess) = 1,650 men; aggregate 2,622 men.