In Colossus, both the US and the Soviet Union developed super sophisticated computers and placed them in commend of their respective nuclear arsenals, capable of responding to an attack against their respective nations instantly, without a human decision maker as a buffer. The two computers, however, quickly established a mode of communication between one another and, using their AI, determined that man would be best served if placed in a condition of subordination to them. They fused their intellects and became one super AI computer directed towards this task. The first time humans attempted to disconnect them, they launched a limited nuclear strike on their respective nations, with the threat of repeating it elsewhere if all efforts to disconnect them didn't immediately cease.
