Other conspiracy theories from the 20th century include the incident of Gleiwitz, in Poland. Many people still speculate whether it was a provocation or an incident and many sources indicate that it was a false flag operation.
In 1939, Nazi Germany had already invaded Austria, the Sudetes and the Czech Republic and was ready to direct all its military power against Poland. Poland had signed a military treaty with the UK and France that ensured mutual assistance in case of aggression. Under the treaty, the countries pledged to intervene in the war if any of the signing countries was attacked.
In order to justify an attack on the neighboring state, a false flag operation was set in motion in which German soldiers dressed in Polish uniforms staged an attack on a radio station in Gleiwitz and then broadcast a message in which they called to arms the Polish minority in Silesia against Adolf Hitler. To produce proof of the attack, the Nazis killed the dressed prisoners from concentration camps in Polish uniforms.
Hitler then issued a communiqué reporting the incident to the German citizens and announced that Germany had declared war on Poland. Up until the Nuremberg trials, when many SS secret documents were declassified, no one really knew what had happened that day.
Other conspiracists claim that through Operation Fast and Furious, Obama’s government supplied firearms to Mexican drug gangs so that they could keep track of them and gather intelligence. The aim was to discover major criminal conspiracies across the border. Without informing the Mexican authorities, the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) facilitated more than two thousand assault weapons in Mexico.
Conspiracy theories are not only about governments. They can also be about companies that target consumers. For example, according to the BBC, tobacco companies deliberately add addictive chemicals to cigarettes.