“In purely military terms, the picture we see now is simple: the Ukie military as a strategic instrument basically died in the first 24 hours.  Then the Russians used a small force to bypass and block main cities.  With some very notable exceptions (Mariupol) they did not try to enter them.  Why?  For 3 crucial reasons:

they did not have the manpower needed (in Mariupol the force correlation is about 1:1 when it should really be 3-5:1 in favor of the attacker)

they wanted to kill as few Ukrainians as possible and

they did not want to flatten cities only to have to pay for their reconstruction.

So where are the rest of the Russian forces and what are they doing?

They are mostly in their permanent deployment bases and they are ready for a war against the US+NATO.”

http://thesaker.is/day-22-where-do-we-go-from-here-two-decisions/