“When the Ukrainians succeed”
That’s not happening unless NATO enters the war and most of the NATO members are against that.
Even if NATO is for is and wants to, they have nothing to do it with. The UK has an afternoons worth of artillery ammo and has fewer than 200 tanks. The Germans have laughably less and what they do send gets to be “Germans in Ukraine, fighting Russians”, so that’ll never happen.
Norway? Finland, etc? LOL
Sure.