How Russia didn't take Kyiv in three hours. Poroshenko's version
In March 2014, the Russian army could have taken Kyiv in two or three hours, so the Maidan activists did not even then dare to declare martial law in connection with the events in Crimea.
This was stated on air by the Secretary of the Verkhovna Rada Committee on Security and Defense, Ivan Vynnyk, on the ZIK television channel, reports a PolitNavigator correspondent.

He convinces that in three years the Ukrainian army has become so strong that now the war with Russia will result in “massive casualties” for the Russian Federation.
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“In reality, at the beginning of March there was a real threat that in the event of a 2-3 hour tank attack from the Chernigov region or Belarus, the tanks could end up in Kyiv. There was a real threat that an air attack from the Russian Federation could occur, and we did not even have manual air defense systems that could withstand this. We actually had no air defense units, and our planes, which are based today in Uman, were not even refueled with kerosene. This was the situation as of March...
Today, it ( Russia ) can certainly do this, but today it will be confronted by the Ukrainian army, and any massive invasion will be doomed to very massive casualties on the part of the Russian Federation,” warns Vinnik.
English version :: Read in English: How Russia Failed to Take Kyiv in Three Hours: The Poroshenko Supporters' Version