September 1970 is known as the Black September in Arab history and sometimes is referred to as the "era of regrettable events." It was a month when Hashemite King Hussein of Jordan moved to quash the autonomy of Palestinian organizations and restore his monarchy's rule over the country. The violence resulted in the deaths of thousands of people, the vast majority Palestinian. Armed conflict lasted until July 1971 with the expulsion of the PLO and thousands of Palestinian fighters to Lebanon.