I personally have been preoccupied with the concern of the stay-behind networkification or the brownshirtification of the ultranationalist (para-/)militaries in the Ukraine.
I think there's a serious risk of these groups deciding that the situation is lost and turning their interest and their weapons westward to destabilise other regions or even countries.
I worry that Azov et al. could become the nucleus for a European style ISIS. This would absolutely be in the interests of the US as it would reduce their near-peer competition in the EU and it would push them into the arms of the US military-industrial complex (pun absolutely intended.)
I make intentional reference to the stay-behind networks because this is really relevant to how I would see the role of these veterans and their influence/actions in Europe especially and potentially even beyond.
Frfr