I've got a big list, mostly worked out by
@67th Tigers :
Side Battle CEV
Union Iuka 0.96
Union 2nd Corinth 1.54
Union Stones River 0.65
Union Chickamauga 1.34
Union Mechanicsville 4.5
Union Gaines Mill 3.55
Union Peach Orchard, Glendale and Malvern Hill 1.28
Union South Mountain 0.64
Union Antietam 0.7
Union 2nd Manassas and Chantilly 0.24
Union Fredericksburg 0.2
Union Chancellorsville 0.26
Union Gettysburg 0.88
Union Mine Run 0.22
Union Shiloh 0.37
Union Champion Hill 0.74
Union Missionary Ridge 0.7
Union Wilderness 0.22
Union 10th May at Spotsylvania 0.39
Union 12th May ditto 0.35
Union Cold Harbor 0.09
Union Petersburg 0.15
Union Crater 0.12
Union Franklin 2.69
Union Peachtree Creek 1.15
Union Nashville 0.59
Union Resaca 0.17
Union Kennesaw Mountain 0.4
Confederate Iuka 1.04
Confederate 2nd Corinth 0.65
Confederate Stones River 1.54
Confederate Chickamauga 0.75
Confederate Mechanicsville 0.22
Confederate Gaines Mill 0.28
Confederate Peach Orchard, Glendale and Malvern Hill 0.78
Confederate South Mountain 1.56
Confederate Antietam 1.43
Confederate 2nd Manassas and Chantilly 4.17
Confederate Fredericksburg 5
Confederate Chancellorsville 3.85
Confederate Gettysburg 1.14
Confederate Mine Run 4.55
Confederate Shiloh 2.7
Confederate Champion Hill 1.35
Confederate Missionary Ridge 1.43
Confederate Wilderness 4.55
Confederate 10th May at Spotsylvania 2.56
Confederate 12th May ditto 2.86
Confederate Cold Harbor 11.11
Confederate Petersburg 6.67
Confederate Crater 8.33
Confederate Franklin 0.37
Confederate Peachtree Creek 0.87
Confederate Nashville 1.69
Confederate Resaca 5.88
Confederate Kennesaw Mountain 2.5
Union Atlanta 2
Union Seven Pines 1.6
Confederate Atlanta 0.5
Confederate Seven Pines 0.66
Side Type median mean
1: Union Normal 0.675 0.5850000
2: Union Def 1.540 1.9000000
3: Union Att 0.260 0.3292308
4: Confederate Normal 1.485 2.3466667
5: Confederate Att 0.660 0.8109091
6: Confederate Def 3.850 4.4607692
The average Union defensive CEV times the average Union offensive CEV is less than one. (It's about 0.4.)
If you take
only McClellan's battles the Union actually outperforms the Confederacy; if you remove McClellan the Union underperforms. This suggests that soldier quality alone is not sufficient to explain the difference.
It'd be interesting to see how it looks if you strip out all of
Lee's battles.