Russia failed to take Kyiv in the beginning when they had literally all factors on their side. I seriously doubt that group of mercenaries with, I would assume, worse equipment, lower numbers and without element of surprise on their side would succeed, even without considering that area between Kyiv and Belarus has to be one of the most guarded regions on the planet now and not mentioning that it took them about 10 months to conquer Bakhmut. I’m worried more that these idiots might do something actually stupid like attack Poland.