From https://t.me/pravdaGerashchenko_en

Foreign Minister #Sikorski:

For us, #Russian aggression against #Ukraine is fundamental, existential. We feel threatened by #Russia. #Russia has waged war, occupied us, wiped us off the map for over a century. So when they threaten us, we believe them.

And they've now spent longer than the #Soviet_Union fought the #Nazis trying to conquer #Ukraine. By our estimates, they've already suffered opportunity costs of a trillion dollars fighting this war