Conspiracy theories that turned out to be true.

I swear I'm not crazy... well not that sort of crazy.

At the request of a few of you wanted a more detailed post of conspiracies that turned out to be true (or have pretty overwhelming evidence). I'm not an expert on this topic, nor do I put faith in a lot of conspiracy theories. Also this isn't a definitive list of known conspiracies just stuff I happened to come across. There are still several more.

EDIT:
@YourFriendlyNeighborhoodPsychonaut provided me w/ this link where you can find a definitive list of conspiracy theories that turned out to be true.
https://www.reddit.com/r/conspiracy/wiki/locc
I'm not a big fan of this list since it includes things I don't believe have proper evidence (ie the business plot to kill FDR). So I take it w/ a grain of salt.

Dark Alliance

Before 1996 if you would of said that the CIA had a hand in the crack epidemic in the US you would of been called crazy. After Gary Webb's investigation though it's become a pretty accepted conspiracy theory. His book Dark Alliance details the CIA's connections to South American Contra groups, the Reagan administration, and the DEA. Even further down the rabbit hole Gary Webb's life was ruined after the books release, and he "committed suicide" shooting himself in the face twice. Oh also if you don't want to read Dark Alliance, but still want to know more there's a film called "shoot the messenger" staring Hawkeye which focuses more on Webb's life.

Project MKUltra

Even today people don't believe (or don't know) that the CIA attempted mind control experiments using US citizens as test subjects despite the Church Committee findings in 1977, and the FOIA public release of 20,000 MKUltra documents in 2001. Overall the full extent of the MKUltra experiments remains a mystery since a majority of the documents were destroyed in 1973.

Tuskegee syphilis experiment

The U.S. Public Health Service under the guise of providing free healthcare left hundreds of syphilis infected men untreated even 20 years after penicillin was found to easily cure the disease. They even went as far as discouraging the participants from seeking treatment elsewhere.

Operation Northwoods

In 1962 the DOD, and JCS proposed performing a series of false-flag operations to garner support to invade Cuba. Luckily President Kennedy shot down the idea. If you mentioned this before November 6th 1998 you probably would of been called crazy.

The Iran-Contra Affair

Ok so this one didn't really have enough time to settle into "theory" territory before being accepted by the media. In 1985 and 1986 the Reagan administration gave authorization to provide weapons in exchange for the release of U.S. hostages. In 1987 this was under investigation by congress, and eventually Reagan took full responsibility.

The BCCI Scandal

The BCCI was once the 7th largest bank in the world. It also turned out to be a huge scandal. Basically it had been setup to avoid as many bank regulations as possible which in turn lead to it being involved in everything from money laundering to terrorism.

The Gulf of Tonkin Incident

The Gulf of Tonkin Incident essentially started the Vietnam war... the problem is it actually never happened. According to NSA historian Robert J. Hanyok the NSA deliberately distorted intelligence reports passed to policy makers regarding the August 4, 1964 incident.

Operation Ajax

Basically the CIA overthrew a democratically installed government in Iran all because of oil, and eventually led to the Iran Hostage Crisis. For years people said the CIA was involved, but there was no proof until records were released in 2000.

Operation Snow White

Operation Snow White was the biggest known infiltration of the US government's history. With an estimated 5,000 covert agents successfully infiltrating government offices. The biggest surprise is that the church of Scientology sent these agents. The aftermath resulted in 5 church members being sentenced to 4 years in jail.

Operation Gladio

First publically revealed by the Italian Chamber of Deputies on October 24, 1990, and officially recognized in 2006 by the US State department it's still unclear exactly what black ops were performed under Operation Gladio. Essentially it was a covert stay behind effort in Europe to fight the spread of communism. It's been accused of several false flag, and terrorist attacks across the EU.

CIA Murders

So during the church commitee investigations we found out that the CIA killed a lot of people in various ways. One of which was a heart attack gun which was practically undetectable at the time. Other various methods included auto accidents, skiing accidents, cancer, and also good ol' fashioned shooting people.

The Bilderberg Group

For years the Bilderberg group meetings were dismissed as crazy conspiracies, but recently they've finally admitted group meetings occur but still insist there's no agenda other than co-operation between the NA and EU. The Bilderberg group meetings consists of the worlds most powerful people meeting (pretty much every US president except GW Bush), and it's unknown what actually goes on there.

1919 Black Sox Scandal

Probably the most well known sports rig in history 8 men were charged w/ fixing the world series after being paid off by gamblers. It didn't take long for this conspiracy theory to turn into conspiracy fact all 8 players were banned from baseball by 1921.