Are you aware that Russia perfectly timed it's Kavkaz 2008 military training near the border of Georgian Region of South Osetia? Just several days earlier before conflict heated up.
And what Russia does when conflict begins? Forwards it's Kavkaz 2008 troops towards Georgia as soon as conflict begins. What a coincidence...
BTW, name South Ossetia was created (yes created) by USSR which aimed to take control over Caucasus, and Georgia was kind of too unified by that time, that was against Russian plans.