The Prime Minister has told ITV News the former head of the British Army's call to deploy thousands of British soldiers in Germany as a warning to Russia was "not necessary".
Lord Dannatt called for a deployment of 3,000 troops to send a message to the Kremlin that the UK takes the protection of its allies seriously after the annexation of Crimea.
David Cameron said he is determined to send a "very clear message" that Britain believes in the security of its Nato partners.
An unusually frank Nato Secretary General issued an unequivocal warning on the course of events should Russia attack Latvia or Estonia.
The West responds with sanctions and closer political ties with Ukraine as Russia's President seals the annexing of Crimea to much fanfare.
Supporters of the controversial fracking industry believe shale gas could be America's most potent weapon in the stand-off with Russia.