Russia published its most recent military doctrine in 2014. Although it discusses nuclear weapons and use, it is not meant to be the last word on Russian nuclear policy.
What the latest military doctrine says
The most recent version of Russian military doctrine identifies the past, present, and future expansion of NATO, and NATO activities “in violation of international law,” as a primary threat to Russian national security. Other main threats include the “creation and deployment of strategic missile defense systems,” which the doctrine argues “violate the balance of forces in the nuclear-missile sphere,” and the “deployment of strategic non-nuclear systems” and precision weapons. The document also references the weaponization of space and cyber and electronic warfare.7
Although Russia’s military doctrine demonstrates a view of the United States and NATO as aggressors in an evolving security environment, it also highlights the value of the arms control architecture and exhorts the military to “conclude and implement agreements in the area of nuclear-missile arms limitation and reduction.”8
The doctrine states that the purpose of Russia’s nuclear forces is to serve as a broad deterrent, and adds that Russia reserves the right to use:
“nuclear weapons in response to use against it and (or) its allies of nuclear and other weapons of mass destruction, as well as in the case of aggression against the Russian Federation with the use of conventional weapons, when the very existence of the state is
Read the full article in the Arms Control Association.