USA 18,399 (2,725 killed, 13,416 wounded, 2,258 captured/missing)
CSA 12,687(1,515 killed, 5,414 wounded, 5,758 captured/missing)
Another example Cold Harbor:
USA 12,738 total 1,845 killed 9,077 wounded 1,816 captured/missing
CSA 5,287 total 788 killed 3,376 wounded 1,123 captured/missing
USA 50% more casualties. Grant was a butcher. He could afford to be.
Being a successful general means being able to pay the butcher’s bill.
Lee and Grant knew that. General’s like Burnside knew it, but, couldn’t pay it. General’s like Brag could pay it, but, paid it poorly.
Spotsylvania Court House, 17% Union casualties, 20% Confederate casualties, for the forces involved.
Cold Harbor 11.5% Union casualties for forces involved.
Gettysburg 34% casualties in the Army of Northern Virginia.
47% casualties for Pickett’s assault force.
Grant suffered more casualties, but as a percentage of forces involved, lower than Lee. But what is much more important to the issue is that within a few weeks, Lee’s Army will be locked up in Petersburg. There it will wither on the vine. Grant will be victorious. At least Grant, in his memoirs admitted “the assault on Cold Harbor was the worst mistake I ever made.” Lee, on the other hand not once admitted that 47% casualties suffered at Cemetery Ridge was a mistake on his part.