The future commander of the Estonian Defense Forces: The war must be able to be taken to Russian territory

If we are serious about UA regaining all territory, they must be allowed to expand the war into Russia. It’s the only way a state can be reached where “return to the status quo ante” is a gain for both sides.

Oof that's not a great idea. Protecting sovereignty is a hard enough sell internationally. Selling an invasion isn't something the international community is really showing an interest in right now.