Here's the 3-star cyber-general James Mattis laying the groundwork exactly a year ago (May 14th, 2008) with the cyber attacks in Estonia:
Video Source: Reuters
Pentagon Preparing For War With The Enemy: Russia
Rick Rozoff - Stop NATO - via Global Research, May 14, 2009
On May 12 James Mattis, NATO's Supreme Allied Commander Transformation [ACT] and commander of the U.S. Joint Forces Command, spoke at a three-day symposium called Joint Warfighting 09 in Norfolk, Virginia, where NATO's Allied Command Transformation is based, and stated: "I come with a sense of urgency. The enemy is meeting like this as well." 
A local newspaper summarized his speech:
"Mattis outlined a future in which wars will not have clearly defined beginnings and ends. What is needed, he said, is a grand strategy, a political framework that can guide military planning." 
He failed, for what passes for diplomatic reasons no doubt, to identify who "the enemy" is, but a series of recent developments, or rather an intensification of ongoing ones, indicate which nation it is.
Last week the head of the U.S. Strategic Command, Gen. Kevin Chilton, told reporters during a Defense Writers Group breakfast on May 7 "that the White House retains the option to respond with physical force - potentially even using nuclear weapons - if a foreign entity conducts a disabling cyber attack against U.S. computer networks...."
An account of his talk added "the general insisted that all strike options, including nuclear, would remain available to the commander in chief in defending the nation from cyber strikes."
Chilton "said he could not rule out the possibility of a military salvo against a nation like China, even though Beijing has nuclear arms,"  though the likely first target of alleged retaliation against equally alleged cyber attacks would be another nation already identified by US military officials as such: Russia.
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