The only great tension, I think, until recently, was the Cuban missile crisis. Until recently, China and Russia have rarely responded to American aggression (though one might count the Chinese intervention in Korea as a step in that direction.) Now, though, Russia is hanging tough in Syria, China is intervening with aid to Venezuela, and indeed Russia and China are assuming greater roles in the middle east.
Thus time go*est on corrupted by elite humanitarian failures ...
We are a busted people, all broken down ... if messed with (high-tailed) there is risk!