It has been suggested Russia would wait until the Winter Olympics finished in Beijing on Feb. 20, in order to avoid stealing ally China's spotlight. Perhaps that will not leave enough time to overrun Ukraine before the spring thaw.
The article includes a map of the region with likely invasion routes marked. We haven't seen its like for decades.
Hat tip to Herman Wouk for loan of this post's title. I wonder if there are any Pug Henrys left to save our bacon. It's damn certain Joe Biden is no FDR.
Later: Several European countries have urged their nationals to leave Ukraine, following the U.S. lead in doing so. And neighboring Poland is permitting free entry with valid passport and, the State Department claims, proof of Covid vaccination.