= The Blessings and peace of Allah on Prophet Muhammad, his Family, and his Companions =
There are many such, here a handful. The first 5 from the US, then other examples.
For details see the page below  – with sources, including some declassified documents:
NB: In human history, there have of course been many -mostly forgotten – conspiracies, except for those of recent history where we have audio, video and written evidence of what was officially proclaimed at the time and what really happened. See also Shortlink What is a Conspiracy Theory.
The Worst Conspiracy in Our Generation
The worst conspiracy in our generation (2021-10-20) is the conspiracy to attack New York, the Pentagon and the 4th attack. And our theory about it is that 9/11 was an inside job. They in the cave in Afghanistan would not have the resources, knowledge to bring this about. Also, the laws of physics cannot be broken, except if miracles happen, but 9/11 was a nightmare, initiating 2 wars, where up to 2 million people had to pay the price, cutting down human and civil rights.
– + –
1935… Conspiracy by the State of the USSR Against Its People
In the ’Great Purge’ of Stalinist Russia about 20+ million citizens of the USSR were eliminated by the state, under the pretext of being in ”association with a perceived enemy” or having a ”terrorist point of view against the leadership of the party,” and other fabrications.
.The Great Purge of Stalinist Russia
1939 The Gleiwitz incident (German: Überfall auf den Sender Gleiwitz; Polish: Prowokacja gliwicka) was a false flag operation by Nazi forces posing as Poles on 31 August 1939, against the German radio station Sender Gleiwitz in Gleiwitz, Germany on the eve of World War II in Europe.
.Gleiwitz incident | Project Gutenberg Self-Publishing
1950ies – 1978~ CIA, Operation Mockingbird, planting, bribing American and European journalists to influence public opinion and gather intelligence.
In 1954, an Israel terrorist network carried out a series of bombings against embassies, post offices, theatres and libraries in Cairo and Alexandria. The goal had been to abort a pull-out of British troops from Egypt. The plotters hoped to pin the blame on the Muslim Brotherhood. But the terrorist scheme was uncovered, and the Israeli cell was broken up and prosecuted, with some of its members receiving the death penalty. The plotters were a small group of Egyptian Jews that Israel had recruited. One of their goals was to frighten Egyptian Jews into fleeing their homeland for Israel.
– Zionism deliberately inciting problems between religious sects
1960ies CIA, MKUltra, “mind control” experiments on unwitting US citizens, drugs, hypnosis, …
1960ies FBI’s COINTELPRO (counter-intelligence program)
FBI harassed numerous political groups and turned many of its members completely paranoid.
1961~ Operation Northwoods, Cuba, hijacking or shooting down a “drone” airliner, bombing a ship and other plans by top US generals to provoke an attack against Cuba. JF Kennedy did not allow it to happen.
1962 Killing of policemen in Italy 1962, Operation Gladio, blamed on the ’Left’, turned out it was right-wingers with the help of the CIA/ NATO.
1965 Bay of Tonkin, North Vietnamese torpedo boats which were not there – as “false flag” attack to provide a casus belli (an act or event that provokes or is used to justify war). It led to a significant escalation of the Vietnam war.
1980 The Bologna railway station bombings in Italy 1980, Operation Gladio, blamed on the ’Left’, turned out it was right-wingers with the help of the CIA/ NATO.
.Italian far-right extremist sentenced to life for deadly Bologna bombing – The Local
2008 The Mumbai Taj Mahal Palace Hotel terrorist attack in 2008, blamed on ‘Muslim’ extremists. Information is scarce, but there are several red flags that show that not everything is straight in the Indian government theory of what really happened.
In fact, there are indications that it may have been an inside job of the Indian Secret service, in order to prepare the country for a fascist state – which we can now witness (in 2021, Modi, Hindutva) to the benefit of the corporations and the mega-rich class of the Indian power elite. (_link is due…_)
Regarding the Gulf of Tonkin
6. Another conspiracy that turned out to become bloody real: Stockholm Bloodbath
Soon after the events of the Stockholm Bloodbath in 1520, king Gustav Vasa had a series of images made…
These images have an obvious political and propagandistic goal. The king wanted to depict his rival Christian II of Denmark as a merciless tyrant. [image-link]
Someone (Denmarks King Christian II) conspired and others were executed.
more: The Stockholm Bloodbath!
Some Videos for Illustration
Jesse Ventura on false flag operations – ”Every war starts with false flag ops.”
.Former Governor Jesse Ventura Picks Fight With Feds Over 9/11 (04.04.11) – YouTube
Former Gov. Jesse Ventura gets into a heated argument with Piers Morgan (BBC) about 9/11 and the government’s response.
”How did they know it so quickly, like they knew it about Lee Harvey Oswald?”
.Ventura’s take on 9/11: ‘They wanted it to happen’ – YouTube