If we sent any of our troops, we will have entered an active conflict with Russia, one of the very few nuclear superpowers.
We haven’t directly fought the Russians or the USSR, ever. It’s been through proxies.
So, no, we never could have gone to war over a former Soviet country that directly borders Russia (unlike Cuba, which is 90 miles away from us, and we panicked). Ukraine is not in NATO and the only agreement we have over Ukraine says we’ll simply talk with Russia.
No, no troops and no money.
Then Putin isn’t a real threat and we shouldn’t BE there, period.