Nobody even knew who started it.
5 seconds sound clip from the The Terminator movie soundboard.
You can hear this line at 00:45:20 in the Blu-ray version of the movie.
Quote context
[...]
- Reese. Why me? Why does it want me?
- There was a nuclear war... A few years from now.
- All this... This whole place. Everything. It's gone. Just gone.
- There were survivors. Here. There.
- Nobody even knew who started it.
- Defense network computers. New... powerful... Hooked into everything. Trusted to run it all.
- Decided our fate in a microsecond: extermination.
[...]