i mean, just look at the cold hard numbers. french and british armies combined, and lets entertain the thought they send everything to ukraine, is like 10% of ukrainian army. its a joke. these countries dont have a serious land force. and this is a land war, not some colonial policing action is south zambezi.  numbers on wikipedia might make you confused, but most of those men arent in combat units.  and the idea its both practical or even possible to send your entire army to ukraine is just nuts. irl maybe they could cobble together 3-4 badly supported and understaffed brigades.  no ones gonna start ww3 over ukraine. economic benefits are at this point slim as russians already took the valuable land. what remains of ukraine is bankrupt rump state, they dont even have 50% of the population they had at 2014.
Montenegro