It was supposed to be a clear-cut, unambiguous invasion. Vladimir Putin’s much larger, richer, and more bellicose Russia staged a shock-and-awe attack on a much smaller, poorer Ukraine. He intended to decapitate the government in Kyiv. Then he would annex the eastern half of the country, and quickly consolidate his easy wins in preparation to ratchet up pressure to force western Ukraine into the Russian Federation.The rest is history. The Russian military proved ill-equipped and ill-supplied. It was poorly led, with a high percentage of low-morale, conscript troops. Russia had no viable strategic plan to capture, much less hold, the...