No, its a limited scale engagement in which the US wants to apply the Afghanistan format to bleed Russia of GDP and its government of popular support. Also test new weapons and tactics. Using far-right extremists, mercenaries - and if necessary - imported Islamists from the failed projects in Syria. An added geopolitical objective is to drive Europe apart from Russia and force it to buy expensive American gas and oil instead of cheap Russian gas and oil.
Leaving aside this has been pushed by the think-thanks that set the US foreign policy for a long time now, major establishment figures came out in the past few days and bluntly stated that this is what they are going to do — when they faced literal nuclear war frenzy coming from a large part of the press and totally ignorant Internet commenters. Hence they are sending weapons and ‘volunteers’ there, but not actually attacking themselves.
Also the volunteers are people like this: