Putin has several times referred to Russia's occupation of Ukraine as a 'Special Operation' rather than a full fledged war, although it looks to be very much like the latter.
But why does he refer to it as such? Why didn't he declare full scare war on Ukraine? What difference would it have made if he had declared full scale war?
Since it's a special operation for Putin, he didn't commit the full bulk of Russian troops for the Ukrainian invasion. Why didn't he do so?