However, the US military has the finest logistic operations in the world.
Also, there is no substitute for fighting an actual enemy. Part of the reason the US (especial Air Force and Naval Aviation) is so good is that they have actually been fighting. From Libya(Reagan), Gulf War I, Serbia, Gulf War II, Afghanistan, Libya (Obama), the US has been fighting quite a bit.
Whenever you are actually fighting an enemy, there is a learning curve. The big question is whether the sanctions and international isolation combined with the Ukrainian resistance will force Russia to back down, before they navigate that.