Russia is inexorably connected to any conflict with any of the aforementioned countries due to their proximity and history.
Russia holds the second most nuclear warheads in the world, trailing only the U.S.
Any conflict with Russia has the potential to lead to a nuclear holocaust.
To put it in perspective, there were 17 kilo tons of TNT dropped on Nagasaki and Hiroshima.
The largest modern nuclear explosion had 8 megatons of TNT. That’s 8,000,000 tons of TNT, In other words a modern nuclear modern day nuclear war would quite literally be Armageddon. Not only for humanity, it’s doubtful the Earth would be able to sustain any life if only 1 percent of nuclear warheads were detonated today.