This essay will solely discuss government admissions to the use of false flag terror.

For example:

• The CIA admits that it hired Iranians in the 1950's to pose as Communists and stage bombings in Iran in order to turn the country against its democratically-elected president

• Israel admits that an Israeli terrorist cell operating in Egypt planted bombs in several buildings, including U.S. diplomatic facilities, then left behind "evidence" implicating the Arabs as the culprits (one of the bombs detonated prematurely, allowing the Egyptians to identify the bombers, and several of the Israelis later confessed) (and see this and this)

• The well-respected former Indonesian president admits that the government probably had a role in the Bali bombings

• The former Italian Prime Minister, an Italian judge, and the former head of Italian counterintelligence admit that NATO, with the help of the Pentagon and CIA, carried out terror bombings in Italy and blamed the communists, in order to rally people’s support for their governments in Europe in their fight against communism. As one participant in this formerly-secret program stated: "You had to attack civilians, people, women, children, innocent people, unknown people far removed from any political game. The reason was quite simple. They were supposed to force these people, the Italian public, to turn to the state to ask for greater security" (and see this)(Italy joined NATO in 1949, years before the bombings occurred)
  

• As admitted by the U.S. government, recently declassified documents show that in the 1960's, the American Joint Chiefs of Staff signed off on a plan to blow up AMERICAN airplanes (using an elaborate plan involving the switching of airplanes), and also to commit terrorist acts on American soil, and then to blame it on the Cubans in order to justify an invasion of Cuba. See the following ABC news report; the official documents; and watch this interview with the former Washington Investigative Producer for ABC's World News Tonight with Peter Jennings*

There are many other instances of false flag attacks used throughout history proven by the historical evidence. See this, this and this. The above are only some examples of governments admitting to using false flag terror.

You can't call it a conspiracy theory when the government itself admits it.

And this is not just ancient history:

• Jimmy Carter's former National Security Adviser - Zbigniew Brzezinski - told the Senate that a terrorist act might be carried out in the U.S. and falsely blamed on Iran to justify war against that nation
  

• A retired 27-year CIA analyst who prepared and presented Presidential Daily Briefs and served as a high-level analyst for several presidents, would not put it past the government to "play fast and loose" with terror alerts and warnings and even events themselves in order to rally people behind the flag