Directed by Russian President Vladimir Putin, Russia practiced carrying out potential nuclear missile launches.
Putin keen to stress these were scheduled, making a point of saying so, as he took command in the Kremlin.
These drills coming hours after planned talks between the Russian leader and US President Donald Trump were cancelled.
Putin's military went to work test firing a ballistic missile in northwestern Russia as top brass were tested on command structures.
A simulated Sineva ICBM launch from a submarine was undertaken in the Barents Sea.
Fighter jets were sent to the skies in an exercise of military strength.