Try another example. That one doesn't work.
First, he didn't invade. The people of Crimea, who were primarily Ruskies, didn't want the same thing happening to them as happened in East Ukieland by the nazis. Bombings and constant military attacks on their civilians. Especially after the 2014 US/NATO-led color revolution/invasion of 2014.
What exactly would we do if China organized a revolution in Mexico and threatened us with missiles in Tijuana? I think I know. Same difference. You get another chance. We're waiting.
LOL! The people of Crimea and Donbas did not rise up against the government of Ukraine; Russian operatives seized the territories militarily. Nor did the alleged attacks on civilians happen in Donbas. In the first place, Russia seized Crimea before hostilities broke out in Donbas. Secondly, the Russian seizure of Donbas happened too quickly for there to have been the pattern of attacks alleged. Admit the reality, Russia took advantage of the events in 2014 to seize territories that it had long coveted. Now Russia is trying to take more territory and subjugate the entirety of Ukraine. The truth is that this is all the war is about.