"The year is 1992 AD. In order to try to counter the threat posed to the planet's survival by Godzilla, Japan's Counter G bureau recruited the most brilliant scientific brains in the world to build a fighting machine. The first machine was called Garuda, but its fighting capabilities were limited. A far more powerful machine was required. They salvaged a robot from the future, Mecha-King Ghidorah, in order to study its advanced technology. Its components were used to build a weapon to fight Godzilla. They called it Mechagodzilla."
January 1, 1970
https://en.wikiquote.org/wiki/Godzilla_vs._Mechagodzilla_II