Sitting here in Kyiv, here is what I see. We need more air power (air defense and air support) in order for the ground offensive to really pack a punch and have the ultimate chance of success. That is Blackhawks, Chinooks, Apache's and some multi-platform fighter jets (one that has capability to take off from short and\or damaged runways). Ukraine can still win at a certain level without the above but with it, there's a much more higher probability.