I missed the joke...you are joking right? What the chechens are doing is called "untraditional warfare ...ala hit-n-run, landmines, booby traps, sneak attacks"
It worked in Vietnam against US...it worked in Afganastan in the 80's against the Soviets. Hell, it worked for the Americans in our fight against the British empire.
Chechnya is a vital strategic part of Russia and has been longer then most parts of America have been in the Union. India, Isreal, the UK in Northern Island all show that a nation can fend off such attacks. Now that the Russians have Chechens fighting the Chechens it is even more sustainable. Especially since most of the rebel terrorists are outsiders who don't live long in battle.