Will Putin's bleak winter gamble pay off?

History tells us winter plays a critical role in warfare, with freezing conditions helping to stop everyone from Napoleon to Hitler in their tracks.<br /><br />Yet Vladimir Putin hopes this winter will make the key breakthrough for his Russian forces in the war in Ukraine.<br /><br />So will his tactics work or come back to bite him?<br /><br />Our resident Russian expert Emma Burrows tells News At Ten Anchor Tom Bradby what you need to know.