If Putin is not stopped this time, he will just wait a few years and then he will invade again and again until he finally takes the whole country.

"Ukrainian officials defiantly rejected a Russian demand that their forces in Mariupol lay down arms and raise white flags Monday in exchange for safe passage out of the besieged strategic port city.
Even as Russia intensified its attempt to pummel Mariupol into surrender, its offensive in other parts of Ukraine has floundered. Western governments and analysts say the broader conflict is grinding into a war of attrition, with Russia continuing to bombard cities."

https://www.newsmax.com/headli....ne/mariupol-forces-s