the european nations do not have the equipment or manpower to fight russia.  the 2 largest nato militaries besides america are britain and germany. the ministers of defense of both countries have said over official channels they do not have the resources to engage russia.  the us army chief of staff said last week the us army does not have the manpower to meet current threats.  the british ministry of defense said recently that the british military does not have the equipment, ammunition or forces to last more than a month as the ukrainian conflict now is fought.
United States