The American CIA has defused 12 million types of documents that have been put online. We will find information on Nazi crimes, Cuban crises, UFO sightings and many other curiosities.
The disclosure of documents was possible thanks to Bill Clinton, who in 1995 ordered that all historical documents, at least 25 years old, should be declassified. The CIA fulfilled this request, but so far they have been available only in the national archives in Washington.
In 2000, the CIA created an electronic CREST database (CIA Records Search Tool) available on the web, but it provided access only to document headers, so in order to know their full content, they had to personally visit the archive. However, in 2014, one of the journalist organizations filed a CIA lawsuit, using the law to access information and demanding that the database be placed on the Internet.
Lastly, the documents are available at -25-year-program-archive, and you can find a lot of interesting information. They describe reports from World War II or the Cuban crisis. There are also materials that will appeal to all conspirators of conspiracy theories and supernatural phenomena, such as UFO sightings, as well as the Stargate Project, based on telepathy research.
Archives cover the period from 1940 to 1990.