It is very difficult to imagine that the Georgians launched their attack against U.S. wishes. The Georgians rely on the United States, and they were in no position to defy it. This leaves two possibilities. The first is a massive breakdown in intelligence, in which the United States either was unaware of the existence of Russian forces, or knew of the Russian forces but — along with the Georgians — miscalculated Russia’s intentions. The second is that the United States, along with other countries, has viewed Russia through the prism of the 1990s, when the Russian military was in shambles and the Russian government was paralyzed. The United States has not seen Russia make a decisive military move beyond its borders since the Afghan war of the 1970s-1980s. The Russians had systematically avoided such moves for years. The United States had assumed that the Russians would not risk the consequences of an invasion.
If this was the case, then it points to the central reality of this situation: The Russians had changed dramatically, along with the balance of power in the region. They welcomed the opportunity to drive home the new reality, which was that they could invade Georgia and the United States and Europe could not respond.
Geopolitical stupidity should be painful.
The US miscalculated big-time by green-lighting the Georgian invasion of Southern Ossetia, and now the country of Georgia (and the US and Israel) are paying the price for that stupidity.