The 2020 doctrine presents four scenarios that might justify the use of Russian nuclear weapons:

– the use of nuclear weapons or weapons of mass destruction against Russia or its allies;
– data showing the launch of ballistic missiles aimed at Russia or its allies;

– an attack on critical government or military sites that would undermine the ability of Russia’s nuclear forces to respond to threats;

– the use of conventional weapons against Russia “when the very existence of the state is in jeopardy”.


https://zapiforum.com/question/conditions-for-russia-to-use-nuclear-weapons/

World war 4 because 3 is already about to start and end

The west keep painting Putin as a crazy despot who can strike a nuclear attack unprovoked . But we have seen him take on this war reasonably . The mighty America despite the democracy didn't make any consultation before canceling two cities in Japan just to show their power .