With all my respect to Afghanistan people they are not a "european nation" which was mentioned in your post. I was commenting on what I have read and nothing else.
As for Ukraine Russia hasn't invaded it. If we invaded it as it might have been planned we would hav just the troubles of partisan war and eternal economic sanctions for taking a debtor with a potential of being ten times heavier than Greece for EU. There are no russian troops in ukrainian territory. There are the will-fighters and I think there also are some military instructors who train the anti-fascists of Donbass just like US military does it with the fascists.

PS As for eastern europe it was not enslaved. It had it politics which was dependant from USSR the way the politics of western europe was defined by US. Once the economical and political system of the commonwealth became inefficient (in fact it was made inefficient) USSR hasn't bombed anyone who was willing to leave the way the kievan puppets of US do it in Donbass. Even the Ukraine itself was left uncharged and 'unpunished'. This change of borders was welcomed by EU and US without any regards to international law and other litter, which they wave now in case of Ukraine.