Often times, false flags are precursors to wars, as was the case with World War II. The German Nazi party had spread false information about Poland attempting an attack, in order to rally public support for the invasion of Warsaw in 1939 which was the catalyst for the war.
False flags may also be used as political strategies, albeit unethical ones, to pin misleading claims or accusations on opponents. This has especially been prevalent in contemporary American politics.
One other notable example of a false flag being used for a political cause occurred in 1954 in Egypt. A group of Egyptian Jewish citizens were hired by the Israeli Army to bomb various embassies. This was in an effort to repel the British occupation of Egypt, as the attacks were wrongly blamed on the Brits.
Modern-day conspiracy theorists also subscribe to false flag beliefs. There are large segments of the population who believe that attacks suck as 9/11, the Sandy Hook shooting, the Las Vegas massacre, or the Pulse nightclub shooting were all false flag operations. This disbelief in official recounts of these attacks is due to mistrust in the federal government, as well as little information provided for some of these attacks.
False flags have been a virulent part of communication, politics, and espionage for decades. Political groups, nations, powerful individuals, or other groups have long been willing to put their opposition down, whether or not their claims were truthful. False flags must be handled carefully though, as they could quite literally lead the world into a massive conflict.