> The Georgian allegations of a Russian invasion were supported, inter alia, by claims of illegal entry into South Ossetia of a large number of Russian troops and armour, prior to the commencement of the Georgian operation. According to Georgian answers to the Mission´s questions, the process of building-up of Russian forces in South Ossetia had started in early July 2008, continued in the course of August and included troops and medical personnel, tents, armoured vehicles, tanks, self-propelled artillery and artillery guns
(From your source)
Tskhinvali is in Georgia by the way. I think that says it all.