What was the name of the radical separatist organization involved in the October Crisis of 1970?

The radical separatist organization involved in the October Crisis of 1970 was known as the Front de libération du Québec (FLQ). The FLQ was an extremist group that sought the independence of Quebec from Canada through militant actions, including kidnappings and bombings. During the October Crisis, they kidnapped two public figures, which resulted in a significant national crisis and led to the Canadian government's imposition of the War Measures Act to restore order. This event highlighted the tensions surrounding Quebec nationalism and the lengths to which the FLQ went to draw attention to their separatist cause.

The other organizations mentioned, such as the Royal Canadian Mounted Police (RCMP), played a role in law enforcement during the crisis, but they were not separatist groups. The Parti Québécois (PQ) and Bloc Québécois are political parties that advocate for Quebec sovereignty but did not engage in the radical activities associated with the FLQ. Therefore, FLQ is accurately identified as the organization specifically linked to the violent actions of the October Crisis.