They did in 1914, and that led to the fall of the Romanovs. Historically, the Russians have always supported the Serbs, much like we have with some of our past conquests.
I wouldn't look for direct intervention, but an insurgent campaign to disrupt Kosovo.
The Russians are on the right side of this issue and President Bush is in the wrong.
Haven’t Clinton and Bush used our military to kill enough Serbs?
Haven’t we lost enough military troops fighting to set up hard core Islamic regimes?
Someone needs to protect the native Serbs left in Kosovo - the ones that haven’t been killed by the Albanian muslims yet.
Our president sure won’t lift a finger against the muslims to save the Serbs.
Why should we risk a major war when we created the mess and are backing the wrong side?
If Russia moves in to protect the Serbs we should wipe our hands of the mess we have made over the last 15 years and pull our people out.