The Bureau for Paranormal Research and Defense (or the B.P.R.D. for short) is an organization charged with protecting America and the world from the occult, paranormal and supernatural. It maintains the services of several supernatural beings. While it focuses on a wide arrange of supernatural activity, they focus mainly on hunting and exterminating the Great Old Ones along with other creatures associated with them.
The B.P.R.D. was founded in late 1920's by Professor Ian Thatch to combat various cosmic threats uncovered in operations. In 1922, Professor Thatch alongside his cohorts, sailed across the vast ocean and encountered a small but highly sinister town known as Innsmouth, which was located on the coast of Essex County, Massachusetts. It was there that Thatch along with the crew discovered unholy and horrendous activities being conducted in the town, and according to his journal, the town was under the command of a cult known as the Esoteric Order of Dagon that worship the "Old Ones from the Stars Above." While they were forced to combat the inhabitants of Innsmouth who turned out to be monsters themselves, the town was later destroyed after one of the crew members called in the Marine Corps to burn it to the ground.
It was from there on, that Thatch along with his two remaining friends and whatever crew member he bonded with decided to remain together in order to combat these extraterrestrial demonic beings. It was not until that when a few months pass that Professor Thatch eventually came to the conclusion that the Esoteric Order of Dagon were attempting to raise the Old One known as Cthulhu from the depths of the Pacific ocean. And they did indeed succeed when they acquired the means despite Thatch and his compatriots attempting to halt their plans. When Cthulhu had risen, he was soon sent back to his dark kingdom in the depths once more before he could full envelop the globe in his influence when Professor Ian Thatch used a spell that counteracted the summoning used to awaken the Old god. It was from there that the B.P.R.D. was fully founded.
It initially had strong links to the United States Army Air Forces and was based at a military airbase in New Mexico. By 1938, the Bureau relocated to a custom built facility in Fairfield, Connecticut. It is a private organization that receives funding from several major governments (mostly the United States and United Kingdom). Professor Thatch served as director until the late 1940's when he stepped down to return to field work. That, however, did not hinder the movement of the group as it remains dedicated and determined to hunt down and destroy any Lovecratian species that threaten to destroy the world. Coupled with that, additional paranormal agents have joined the organization to aid in combating these beings should they require more "fire power". While they are a very private organization, they are well respected by other secret organizations as well as having excellent relations with United States government agencies.