Operation Piercing Viper

Operation Piercing Viper was a covert procedure that the Chinese infiltrators, saboteurs, and spies were performing in Appalachia.

Background
Carried out from the Deep, beneath the Whitespring Resort in the Savage Divide, Operation Piercing Viper was started after the Vault Dweller infiltrated the the Motherlode Acquisition Facility. It likely refers to the drilling of the [REDACTED] fifth tunnel.