"We have to account for three-party [threats],” Richard said at this year's conference. "That is unprecedented in this nation's history. We have never faced two peer nuclear-capable opponents at the same time, who have to be deterred differently."
"Moscow is using both implicit and explicit nuclear coercion,” the admiral said. "They're trying to exploit a perceived deterrence gap, a threshold below which they mistakenly believe they may be able to employ nuclear weapons," such as through the use of tactical, shorter-range nukes.
"We've got some better two-party stuff that's actually working quite well in the current crisis that is radically different," he explained. "Non-linearity, linkages, chaotic behavior, inability to predict – all attributes that just don't show up in classic deterrence theory."