We have not sent any armed force to do anything in Russia.
Its a very large version of Alaska. Why would we want to invade? I cannot imagine a reason. Do they have copper mines? No. They have nothing that we would need. They may have something that China needs or that Europe needs, but we don't. Also we are far, far away. It is expensive and inconvenient to invade them. Let them be. We have plenty of wheat, and we have temperate climate. We can make our own vodka, too. Let them make theirs.
There is no way to conquer Russia without violating the Geneva Convention. We would either have to slaughter a great number, or we would have to both deport and import a great number and force intermarriage of millions of people. We'd have to wipe out the Russian culture. It would simply not work. It also would go against the concept of our own country, so it would weaken us. So only if they declare war on us can such a thing be possible and even then it is going to scare the hell out of our allies. We don't want to be called bloody or conquerors.
We also have Russian people who live here and are citizens here. We even have Russian Orthodox churches. These also would cause us problems were we to attempt to conquer Russia. I'm not saying we couldn't handle them. We could, but it would not be very acceptable to the public here.