This is now more than just self defense from Russia.
Letting your opponent determine where, when and how a war will be fought guarantees you will lose.
well, we don’t know the aim of this and it will evolve, but this is self-defense from Muscowy.
Ukraine has been playing defense for 2.5 years now - initially very successfully, but now a stalemate.
They needed to go on the offensive to keep up their defense - by diverting Muscowy’s attention.
This incursion is perhaps an attempt by Zelenskyy to influence US elections in favor of Harris, who will prolong the war. Ultimately, the incursion will fail, with a significant loss of Ukrainian troops.