Ukraine have been destroying russian troops and equipment with...

Ukraine have been destroying russian troops and equipment with western weapons before today and I think Russians have also been destroying Ukraine troops and equipment.

Russia have said that if long range western weapons are used deep inside Russia they will consider provision of Russian weapons to enemies of the US. That would be an unfortunate escalation and Joe Biden has made it clear that he has not given approval to Ukraine (remember its not ukraine's decision) to use US weapons beyond the rear areas of the line of contact.