The consolidated morning reports of the Union Army for June 30th, 1863, give the numbers 'actually available for line of battle,' or the effective force, including officers and men, as follows:

Command	Cavalry	Artillery	Infantry	Total
First Army Corps	67	619	9403	10089
Second Army Corps	82	551	12363	12996
Third Army Corps	---	677	11247	11924
Fifth Army Corps	---	555	11954	12509
Sixth Army Corps	124	1039	14516	15679
Eleventh Army Corps	52	644	9197	9893
Twelfth Army Corps	---	396	8193	8589
Cavalry Corps	12653	491	---	13144
Artillery Reserve	----	2211	335	2546
Aggregate	12978	7183	77208	97369

Between June 30th and July 3d, the reenforcements that joined the army may be estimated as follows:

Stannard's brigade to 'First Corps ..................2,500
Lockwood's brigade to Twelfth Corps ...........1,700
Duvall's company Maryland cavalry to
Gregg's cavalry division ............................... 60
Rank's Pennsylvania artillery to Gregg's
cavalry division ........................................... 50
====================================
Total reenforcements ................................... 4,310

This number, added to the strength as per returns of June 30th, makes a maximum of 101,679 effectives of all arms.

The severe marches following the roll-call of June 30th considerably reduced by sickness and straggling the strength of the commands, but a satisfactory computation of the shrinkage from these causes does not seem possible. It may have ranged from five to ten per cent.

The field returns of the infantry and artillery of the army corps, for July 4th, give the following effective figures:

First Corps (except one regiment
detailed as wagon guard)................ 5,430
Second Corps................................. 6,923
Third Corps.................................... 6,130
Fifth Corps......................................9,553
Sixth Corps................................... 12,832
Eleventh Corps............................... 5,513
Twelfth Corps (except one
battery on reconnoissance).............. 9,757
===============================
Total ..............................................56,138

Adding to this the loss of 21,905 sustained by the commands mentioned, gives an approximate calculation of the strength of the seven army corps, viz., 78,043.

There are no field returns of the Cavalry Corps or the Artillery Reserve for July 4th. But by assuming, in round numbers, 78,000 as the maximum fighting strength of the seven army corps, and adding 13,000 for the Cavalry Corps, and 2500 for the Artillery Reserve (as shown by the return for June 30th), an aggregate of 93,500 is obtained.

The effective strength as reported by the seven army corps commanders at the council held on the evening of July 2d, was as follows: 'About 9000, 12,500, 9000, 6000, 8500, 6000, 7000,--total 58,000.

Unfortunately the particular corps represented by these figures are not stated in the minutes of the council.

According to the returns of the Confederate Army for May 31st, 1863 (the latest immediately preceding the battle), the 'effective total' of enlisted men was:

Infantry......................... 54,356
Stuart's Cavalry............ 9,536
Artillery....................... 4,460
Alexander's and Garnett's artillery battalions, consisting of ten batteries, are not included in the above figures. Their effective strength may, however, be put at 800 officers and men. There were also 6116 officers borne on the return as 'present for duty,' which, added to the foregoing, give an aggregate of 75,268 officers and men,

The accessions by organizations to the army between May 31st and July 3rd were as follows;
..........................................................|Estimated at not less than
1st. Pettigrew's infantry brigade.......|... 2,000
2d. Jenkins's cavalry brigade............|... 1,600
3d. Imboden's cavalry brigade..........|... 2,000

Total gain .............................................5,600

The loss by organizations during the same period was:

1st. Corse's brigade and one regiment
of Pettigrew's brigade left at Hanover Court House, Va.---------------- 2,000
2d. Three regiments of Early's divisionleft at Winchester, Va. -------- 1,009
3d. One regiment of Stuart's cavalry left in Virginia -------------------- 350
======================================================
----------------------------------------------------------Total loss (estimated)3,350

or a net gain of 2250, which, added to the strength on May 31st, of 75,268, makes a maximum in the campaign of 77,518. After making a liberal allowance for losses by sickness, straggling, guards to prisoners and casual ties in the various encounters between June 1st and June 30th inclusive, it seems reasonable to conclude that General Lee had at his command on the field of battle, from first to last, an army numbering at least 70,000 men of all arms.

(From Battles and Leaders of the Civil War)