President Medvedev said the Georgian conflict was "a provocation".
Russian President Dmitry Medvedev has blamed the United States for the recent conflict in Georgia, in his first state-of-the-nation speech, reported BBC.
The August war over Georgia's rebel South Ossetia region was the result of "conceited" US foreign policy, he said.
Mr Medvedev, who succeeded Vladimir Putin in May, vowed that Russia "won't retreat in the Caucasus".
He also told parliament that he wanted to extend the Russian presidential term from four to six years.
He blamed Washington for the global financial crisis, but said Russia would "overcome" the challenge.
"The tragedy of Tskhinvali [South Ossetia's capital]... was a consequence of the conceited policy of Washington," Mr Medvedev said.
He said that "the conflict in the Caucasus was used as a pretext for sending Nato warships to the Black Sea and also for the foisting on Europe of America's anti-missile systems".
The Russian leader warned that Moscow would take "retaliatory measures".