Response Scenario MX-CN91

Response Scenario MX-CN91 was a pre-War initiative, clearing a retaliatory nuclear strike from the United States.

Background
Protocol outlined in the Hopeville Missile Base silo network security codes and Fort Constantine launch codes included clearance information regarding Response Scenario MX-CN91, stating "ICBM RESPONSE/NUCLEAR" and "BASE COMMAND EYES ONLY."

On October 23, 2077, NORAD confirmed the launch of nuclear weapons. Defense Intelligence Agency operatives at the Switchboard then reported and confirmed the authenticated order for Response Scenario MX-CN91.

Appearances
Response Scenario MX-CN91 is mentioned in Fallout 3, Fallout: New Vegas, and Fallout 4.