The Night City Holocaust, also known as the Arasaka Headquarters Bombing or AHQ Disaster, was a nuclear disaster in Night City that occurred on August 20, 2023. During the Fourth Corporate War, on August 20 2023, a Militech incursion team led by Morgan Blackhand and Johnny Silverhand attempted an infiltration mission into the Arasaka Towers of Night City in order to copy or destroy the Arasaka Corporation's Reliquary Database Project, and erase the Soulkiller 3.0 program from their network. John

Today, August 20 2023, is the day when Johnny Silverhand blows up Arasaka Towers with a nuclear device. (Some sources say Morgan Blackhand was also involved, but Johnny claims no knowledge of this.)