@Alexandra2001
I believe that Ukraine would need to accept ruling out ever joining NATO, and also rule out ever re-developing or deploying nuclear weapons in their country.
The nuclear weapons issue has immediately been dismissed in some quarters as false, but if the following comments:
"Ukraine has no other choice: either we are part of an alliance such as NATO and are doing our part to make this Europe stronger, or we have the only option – to arm by ourselves, and maybe think about nuclear status again. How else can we guarantee our defense?"
By Ukraine's Ambassador to Germany (reported by the NYT) are correct, then
we can assume that it'll be part of any ceasefire.
Whether Zelensky will be willing to compromise is another matter. Moreover, weapons has been distributed to civilians and militia groups - clearly, a decision taken in extremis. But what if some of these militia groups - now well armed - decide that they don't accept the terms of any ceasefire or consider the government to have betrayed them in doing so? I think that normal life has disappeared in Ukraine for a very long time.
The Mayor of Vasylkiv yesterday expressed that she saw concessions - but not capitulation - as acceptable in order to end the war. I'm not sure that the militias will see it the same way.
At some point we will have to take a realist perspecitve; that Ukraine poses a security dilemma for Russia if it's incorporated into NATO or treated as a de facto member.
I don't say that to detract from the fact that Russia's actions have been abhorrent, illegal, and totally unacceptable to the international community.