Operation Behemoth

Name
Operation Behemoth(English:hippopotamus)-1 and Behemoth-2 were military exercises held by the Soviet Northern Fleet. Behemoth-2 was the first time a nation's ballistic missile submarine launched all of its missiles at once.

Exercise
Surface and submarine naval exercise.

Duration
1989 and 1991.

Participants
USSR.

Link
http://en.wikipedia.org/wiki/Operation_Behemoth