this only supposes that nato doesn't have absolute air and firepower superiority. the reason why ukraine and russia are in a war of attrition is because they're effectively equals.  nato doesn't play by those rules. the fact that the average russian soldier doesn't have nods, that they use civilian vehicles rather than up-armoured military ones is all you need to know about the resources and logistics they have. it's even the same with drones. the reason why both russia and ukraine are using drones is because they do not have enough precision weapons, so they have to use drones to get more bang per buck.
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