 The Shanghai Cooperation Organisation is a Eurasian political, economic and security alliance, the creation of which was announced on 15 June 2001 in Shanghai, China.It is the largest regional organisation in the world in terms of geographical coverage and population, covering three-fifths of the Eurasian continent and nearly half of the human population.The Collective Security Treaty Organization is an intergovernmental military alliance that was signed on 15 May 1992.