July 8, 1966 –

Universal Studios released Frankenstein Conquers the World (Furankenshutain tai chitei kaijû Baragon – Frankenstein vs. Baragon) directed by Ishiro Honda and starring Nick Adams, Tadao Takashima and Kumi Mizuno, to U.S. theaters on this date.
The film is often associated and said to be originated with the 1962 pitch by Willis H. O’Brien titled King Kong vs. Frankenstein, also known as King Kong vs Prometheus. That would lead to the original King Kong vs Godzilla but is not the primary reason for this film being made. Henry G. Saperstein had previously distributed Mothra vs. Godzilla with UPA and announced that Toho & UPA would produce a Frankenstein vs Godzilla film, thus the original idea for the film came from Sperstein’s group. A Frankenstein vs Godzilla story would be written before it was decided to create a new monster and make the Frankenstein monster a more compassionate character.
