They may still have some scary stuff in store. They just started with truly nasty attacks on the population by blowing up dams. Sure they don't have good troops

They may still have some scary stuff in store. They just started with truly nasty attacks on the population by blowing up dams. Sure they don't have good troops or supply lines, but WMDs, and especially bio programs, don't need many trips or long supply lines. And are, compared to tanks and aircraft, both cheaper and easier to develop and maintain as part of a massive military expenditure. Right now, when they are getting more desperate, is getting closer to when Putin may feel compelled to push the red button.