I was feeling masochistic so I browsed for a while, and remembered that all pro-Ukraine folks seem to take this as a fact. I remember trying to look into this and not finding any evidence, and angry libs were not exactly forthcoming with sources themselves.

So besides the initial feint towards Kyiv (which AFAIK is circumstantial at best) was there ever any evidence pointing towards some Russian plan to eventually annex the entirety of Ukraine?