The May 19th Communist Organization (also variously referred to as the May 19 Coalition, May 19 Communist Coalition, and various alternatives of M19CO), was a US-based, self-described revolutionary organization formed by members of the Weather Underground Organization. The group was originally known as the New York chapter of the Prairie Fire Organizing Committee (PFOC), an organization devoted to legally promoting the causes of the Weather Underground. This was part of Prairie Fire Manifesto change in Weather Underground Organization strategy, which demanded both aboveground mass and clandestine organizations. The role of the clandestine organization would be to build the "consciousness of action" and prepare the way for the development of a people's militia. Concurrently, the role of the