Putin's major miscalculation

"War is organized chaos," these words belongt o one of the deputy commanders to Gen. Eisenhower after the Normandy landing in 1944. Now I'd say the battlefield in Ukraine is a good example of this rule. One of the most striking features of the current war is how ill-prepared the Russian military has been. No Plan B in case things don't go according to plan. The other thing that sticks out is how slow the Russian military has been to make adjustments and adapt.

This, according to an analysis published by the Royal Joint Services Institute, a leading British defense think tank. Those analysts cooperate with the General Staff of Ukraine in preparing operational analyses for the Ukrainians and therefore are privy to details, some of which are still classified:

https://www.consilium.europa.eu/en/documents-publications/library/library-blog/posts/think-tank-reports-on-the-invasion-of-ukraine/