It is when you use the muster roles of a few unionist regiments as a more reliable source than the sources of James G. Randall.Listing official Unionist muster roles is not cherry picking. No one especially myself who has a threat entitled " How serious was desertion in the Union Army" has ever stated desertion was not a major problem in the Union Army.
On the other hand we should not ignore the fact that there was considerable desertion in the Confederate Army has well to offset Union desertions.
Si far no evidence had been presented that thousands of Union soldiers defected to the Confederate Army.
If the Confederacy didn't have any major problems with desertion but the Union Army did then the Confederate Army should of won.
I never said the Confederates didn't have major problems. Any problem was likely to be a major one compared with the US, given the latter country's far greater manpower pool and war materiel capability.