I suspect that the CIA and other USA military intelligence groups have ferried a bunch of Ukrainians out of country to train them on the next tranche of weapons well before they arrive (or even announced). They probably have large groups fully up to speed on the Bradley and maybe even the M-1. I think that the "West" has realized this is a turning point for Putin. Finally, there might be something that can take him out or weaken him so much that they are toothless (except for the oil but they are so corrupt, they would never use it for other than personal gain). In hindsight, if the West had just sent in airplanes and troops and tanks and all that how easy it would've been to push out Russian solders. But here we are and there isn't much left in the tank for Putin.