Great Blackout

The Great Blackout was a worldwide nuclear EMP-produced blackout that began during the Great War and lasted for an unknown period of time.

Background
The Blackout seems to have stopped all functioning vehicles. When Salt Lake City was hit directly with thirteen nuclear warheads, the Survivalist's truck and a passing Chryslus car came to an abrupt stop. A Chinese People's Liberation Army Navy submarine, Shi-huang-ti, washed ashore in the San Francisco bay area after it ceased to function due to the Blackout.

Appearances
The Great Blackout was referenced by the Shi in Fallout 2 and by Randall Clark in Honest Hearts. An "Emp Attack" was referenced by Staff Sergeant Michael Daly in his personal log in Fallout 4.