Some units failed to follow cleared paths and ran into mines. When a unit delayed a nighttime attack, an accompanying artillery bombardment to cover its advance went ahead as scheduled, tipping off the Russians.
Isn't this literally a WW1 strat? Probably even older. Is this the cutting edge doctrine that US teaches and UA fails to implement?
Anyway, hindsight is 20/20, but why did the Americans bother to teach their way of fighting? Ukraine has different constraints and if I had to guess, slightly different army composition. I've heard that the US relies heavily on having complete air superiority, which UA doesn't have. I suppose they know other ways of fighting too, but unless I'm missing something, this seems like a massive oversight from NATO, to the point of hubris.